Irish Folk Medicine: Herbs, Holy Wells and the Cure

Article Summary

What this article covers: How Irish folk medicine worked as a system, from Gaelic healing myth and Brehon medical law to native plants, holy wells and the hereditary gift known as the cure.

Who this is for: Travellers with Irish heritage, readers researching traditional remedies, and visitors planning to see Ireland’s healing sites for themselves.

Key takeaway: Irish folk medicine ran on two parallel tracks, practical plant knowledge and inherited spiritual healing, and both are still visible in the Irish countryside today.

Expert insight: “What surprised me most, visiting wells in Clare and Fermanagh, is how unremarkable it all looks. Nobody makes a performance of it. A car stops, someone walks the rounds, ties a strip of cloth on the tree and carries on to work.” , Ciaran Connolly, Founder of ConnollyCove

Quick facts:

• More than 3,000 holy wells have been recorded across the island of Ireland, and roughly a third are still visited or remembered locally.
• Holy wells were chosen as the subject of the Irish Free State’s first national folklore survey in 1934.
• Between 1937 and 1939, around 50,000 schoolchildren filled over half a million manuscript pages with local lore, including thousands of cures.

Ask an older neighbour in rural Ireland about a stubborn burn or a bad sprain and you may still be pointed towards a person rather than a pharmacy. That instinct is the working edge of Irish folk medicine, a body of knowledge that kept communities going when doctors were distant, expensive or simply unavailable.

Two strands ran side by side. One was plant knowledge, gathered from bog, hedgerow and shore. The other was the healing gift, passed down inside families under strict rules about who could hold it. Both sat alongside the older mythology ConnollyCove covers in its guide to Celtic mythology creatures.

This guide works through the origins of Irish folk medicine, the plants themselves, the tradition of the cure, the sacred sites tied to it, and where travellers can meet this heritage now.

Where Irish Folk Medicine Came From: Gods, Law and Learned Families

Irish folk medicine has three identifiable sources: pre-Christian mythology, a written legal code that treated medicine as a profession, and hereditary families who translated Europe’s medical texts into Irish. Most popular accounts skip the middle two, which is where the depth sits.

Dian Cécht, Airmed and the Healing Gods

The mythological root of Irish folk medicine is Dian Cécht, physician to the Tuatha Dé Danann. In Cath Maige Tuired, he and his family tend the wounded at a well often called Sláine, where injured warriors are restored. His son Miach and daughter Airmed both practise healing, and the story turns on Dian Cécht’s jealousy of his son’s skill.

After Miach’s death, Airmed is said to have found 365 healing herbs growing on his grave, one for every joint and sinew in his body. She laid them out on her cloak in order, and her father scattered them so nobody would know the full arrangement. ConnollyCove’s guide to the Tuatha Dé Danann sets out who these figures were.

That layer never fully disappeared. It survived as an assumption running underneath later Irish folk medicine: healing plants were given, they belonged to particular places, and knowing them was a responsibility rather than a trade.

Sick Maintenance and the Physician under Brehon Law

Early Irish law treated care as an enforceable obligation. Under the Brehon tracts, a person who injured another could be liable for that person’s sick maintenance, covering nursing, food and suitable accommodation during recovery. Legal commentary describes the sickroom in detail, including requirements for quiet.

The physician, the liaig, held recognised professional standing with a defined honour price, and a healer who made things worse through incompetence faced penalty rather than payment. This is the part outside accounts leave out, and it reframes Irish folk medicine entirely: Gaelic Ireland had medical accountability written into law.

Those habits outlasted the legal system. The later expectation in Irish folk medicine that a healer answers to the community and works without charge reads like a folk memory of exactly this arrangement.

Monasteries and Ireland’s Hereditary Medical Families

From the medieval period, medical learning was concentrated in a handful of hereditary families who ran schools and kept libraries. Names such as Ó hÍceadha, Ó Leighin and Ó Callanáin appear repeatedly in surviving manuscripts, translating Latin and Arabic authorities into Irish for use by Gaelic physicians.

This put Ireland in an unusual position. Where formal medicine elsewhere in Europe was conducted in Latin, Irish practitioners read Galen and Avicenna in their own language, then set that material beside the local plant knowledge that underpinned Irish folk medicine. Monastic gardens supplied many of the herbs. The same pattern of learned families shaped other professions, as ConnollyCove covers in its piece on ancient Irish poets.

When that structure collapsed under conquest and the penal restrictions that followed, the knowledge dropped down into households and townlands. That is where the plant side of Irish folk medicine survives.

The Wild Pharmacopoeia of Irish Folk Medicine

Irish folk medicine was built around whatever grew within walking distance: shoreline seaweeds, bog plants, hedgerow leaves and roadside weeds. Very little was exotic and almost nothing was bought. This section covers the main plants, the preparations, and what is now understood about them.

Carrageen Moss, Bog Myrtle and the Plants of Wet Ground

Ireland’s wet ground supplied some of the most-used remedies in Irish folk medicine. Carrageen moss, carraigín, is a red seaweed gathered off western and southern shores, dried, then simmered in milk until it sets into a pale jelly. It was given for chest colds, coughs and upset stomachs, and it is still sold in Irish shops.

Bog myrtle, growing across peatland, was used against insects and for scenting linen, and its aromatic oils have since drawn real scientific interest. ConnollyCove’s guide to the cultural significance of bogs covers how central this landscape has been to Irish life.

Gathering had its own timetable. Plants were taken at particular points in the year, and the rules about when to pick were held as firmly as the rules about what to pick.

Nettle, Dandelion and the Spring Tonic

The best-documented habit in Irish folk medicine is the spring tonic. After a winter on stored food, families ate nettles, neantóg, boiled into soup or tea, often for three meals in May to clear the blood for the year. Nettle genuinely carries iron and vitamin C, so the practice had a defensible basis even if the reasoning did not.

Dandelion, caisearbhán, went the same way, its leaves eaten and its roots dug for liver and digestive complaints. Both were understood as food as much as medicine, which is how the boundary tended to work in Irish households. ConnollyCove’s guide to Irish flowers covers more of the native flora these remedies drew on.

Where these plants were mild, others were reserved for injury, and the standards for those were different.

Plantain, Sphagnum Moss and Wound Care

Wound treatment relied on plants chosen for absorbency and astringency. Ribwort plantain, known in Irish as slánlus, meaning the health plant, was crushed and pressed onto cuts, stings and grazes. Figwort was used for skin eruptions and swellings.

Sphagnum moss is the strongest case of Irish folk medicine being vindicated. Bog moss holds many times its weight in liquid and is naturally acidic, which slows bacterial growth. It had long been packed into wounds in rural Ireland, and during the First World War it was collected in quantity as surgical dressing. See ConnollyCove’s fuller account of Irish folk healing.

Knowing which plant to use was only half of it. Preparation mattered just as much, and that knowledge usually sat with the women of the household.

Poultices, Infusions and Ointments

Preparation methods in Irish folk medicine were few and repeatable. Herbs were dried and stored for winter. Infusions were steeped in hot water for light complaints; decoctions were boiled harder for roots and bark. Poultices, mashed plant material spread on cloth and laid warm on the skin, treated boils, sprains and chest congestion. Ointments were worked into animal fat or butter.

These were kitchen skills, learned by watching, and they sat alongside other household crafts. ConnollyCove’s overview of Irish traditions places this domestic knowledge in its wider setting. The table below pairs the commonly recorded remedies of Irish folk medicine with current understanding.

Complaint	Plant	Traditional preparation	What is known now
Chest cold, cough	Carrageen moss (carraigín)	Dried, then simmered in milk into a jelly	Rich in polysaccharides that soothe and thicken; still used as a food thickener
Open wound	Sphagnum moss	Dried and packed into the dressing	Highly absorbent and acidic; used as surgical dressing in the First World War
Joint and muscle pain	Meadowsweet (airgead luachra)	Flowers infused as a tea	Contains salicylates; the name aspirin derives from Spiraea, meadowsweet’s former genus
Spring fatigue	Nettle (neantóg)	Young tops boiled as soup or tea	A real source of iron and vitamin C after a poor winter diet
Cuts and stings	Ribwort plantain (slánlus)	Leaves crushed and applied directly	Astringent, with some antibacterial activity recorded

None of this is treatment advice. It is a record of what people did and why, and anything listed here belongs in a conversation with a doctor first.

An Leigheas: The Living Tradition of the Cure

Alongside the plants ran something different. The cure, an leigheas, pronounced roughly “un LY-us”, is a healing ability held by a specific person for a specific condition. It is not herbalism, it is not training, and it cannot be bought. This strand of Irish folk medicine is still quietly active.

What Having the Cure Actually Means

A person with the cure treats one named ailment and nothing else. The cure for the burn, the sprain, shingles, ringworm, warts, thrush or a stye: each belongs to a different individual, and asking the wrong person is a category error. Treatment might be a few words said over the affected area, a hand laid on, or a small action repeated three times.

Locally nobody frames this as belief or disbelief. It is closer to practical information: you know who has it the way you know who fixes cars. ConnollyCove’s piece on Irish superstitions takes a similar view of how these habits function day to day.

Where a cure comes from is governed by inheritance, and one route into it is famous well beyond Ireland.

The Seventh Son and Inherited Healing

The seventh son of a seventh son, an unbroken line of seven boys with no daughter between, was held to be born with healing power rather than given it. The gift was associated particularly with skin conditions, ringworm and the stopping of bleeding. Some accounts say the child was born holding a worm or small object in his fist, with the power tied to keeping it.

Most cures pass by gift rather than birth order, handed on deliberately and often late in life. Local collections record dozens of variations, and ConnollyCove’s County Kerry folklore guide shows how much detail changes between districts.

How a cure is delivered varies just as much, and this is where Irish folk medicine shades into older ritual habits.

Charms, Words and Sympathetic Ritual

Many cures worked on transference, moving the illness out of the patient and into something else. A wart could be rubbed with a snail, a stone, or a piece of meat later buried, and as the object rotted the wart was expected to go with it. Children with whooping cough were passed under a briar or a donkey’s belly.

Spoken charms, usually prayers or half-remembered verse, were said over the patient and almost never written down. Protective objects worked on related logic, as ConnollyCove’s guide to Irish good luck charms describes. One category has measurable pharmacology behind it, and the other does not, and a fair account of Irish folk medicine says so without sneering at either.

What holds the tradition together is not the ritual but the rules around it.

Secrecy, Alternating Lines and the Refusal of Payment

The customs governing the cure are strict and consistent across the country. Money is not accepted; charging is believed to destroy the gift. Tea, biscuits or a small present are the alternatives, and even that is understated. The cure generally passes across the gender line, man to woman and woman to man, often on a deathbed.

Transfer it wrongly and the giver is said to lose it without the receiver gaining it. Discretion runs through everything, and holders rarely advertise. These conventions link back to older ideas about healing as obligation, explored in ConnollyCove’s coverage of ancient Irish rituals.

“I grew up hearing that a neighbour two townlands over had the cure for the burn, and nobody thought that was odd. You didn’t ring ahead, and you certainly didn’t offer money. You called in, you were given tea, and that was the whole transaction.” , Ciaran Connolly, Founder of ConnollyCove

Sacred Water and Sacred Trees in Irish Folk Medicine

Irish folk medicine is written into Ireland’s geography. Holy wells, rag trees and blessed stones turned the countryside into a working map of cures, and much of that map is still readable. More than 3,000 wells have been recorded on the island, and a substantial share remain in use.

Holy Wells and the Rounds Walked at Them

Most Irish holy wells specialise. One is known for eye complaints, another for headaches, another for backs or warts. Many are tied to a local saint and a pattern day, an annual gathering on that saint’s feast. The practice at them is called making the rounds: walking a set number of circuits, usually sunwise, while praying.

These sites were venerated before Christianity arrived and were absorbed rather than replaced, which is why older and Catholic elements sit together at the same spring without friction. ConnollyCove’s guide to holy wells goes through individual sites and their specialities.

Well	County	Traditional speciality
St Brigid’s Well, Liscannor	Clare	Eye complaints; heavily decorated with offerings
St Brigid’s Well, Kildare town	Kildare	General healing, with an Imbolc gathering
Doon Well	Donegal	General cures, with a rag tree alongside
Struell Wells	Down	Eye well and drinking well, linked to St Patrick

Almost every well of this kind has a tree beside it, and the tree carries its own rules.

Rag Trees, Clooties and Votive Offerings

The tree beside a well is usually a hawthorn or an ash, and visitors tie strips of cloth to its branches. As the rag rots, the ailment is expected to fade with it, which is the transference logic of Irish folk medicine worked outdoors. These are often called clootie trees, from the Scots word for cloth.

The convention is to leave rather than take, and never to remove what somebody else has left. Synthetic fabric causes real damage here because it does not break down, so the logic of the custom fails. ConnollyCove’s guide to fairy trees explains why these trees are left standing when everything around them is cleared.

All of which raises a fair question for anyone planning to go and look at one.

Visiting These Sites Respectfully

Most wells are unmarked, unstaffed and reached across farmland. Ask before crossing private land, park clear of gates, and keep dogs on leads near livestock. If you want to leave something, use natural fabric or leave nothing. Walk sunwise if you walk at all, and if a pattern day is under way, stand back rather than joining in.

These sites are where Irish folk medicine is most visible, so photograph the place rather than the people praying at it. If a local offers to tell you about the well, that conversation is usually worth more than the visit. ConnollyCove’s piece on sacred wells covers the wider Celtic background to these customs.

The written record of Irish folk medicine survives largely because of one project carried out in the 1930s.

Irish Folk Medicine Today: Archives, Language and Travel

The tradition is better documented than most people expect, thanks to a national collecting effort that captured it as it began to fade. Between the archive, the surviving Irish terminology and the sites themselves, Irish folk medicine is unusually accessible for something this old.

The Schools’ Collection and What the Children Wrote Down

Between 1937 and 1939, the Irish Folklore Commission asked primary schoolchildren across the Irish Free State to collect local tradition from parents, grandparents and neighbours. Around 50,000 pupils in roughly 5,000 schools filled over half a million manuscript pages, and local cures were one of the assigned topics.

The result is thousands of remedies recorded in the words of the people who used them, townland by townland. It is held at University College Dublin and digitised through the Schools’ Collection, the single best free resource on the subject. County-level tradition varies considerably, as ConnollyCove’s guide to County Cork folklore shows.

Reading the archive, one thing stands out quickly: the vocabulary itself carries the medicine.

The Language That Carries It

Irish plant names frequently describe function. Slánlus, ribwort plantain, is the health plant. Lus attaches to dozens of species, and luibheolaíocht is the study of herbs. The everyday toast sláinte is simply the word for health, which tells you how closely health and hospitality sat together.

That same compression shapes how Irish folk medicine was talked about, and it shows up in sayings about illness, rest and neighbourly obligation, of the kind gathered in ConnollyCove’s collection of Irish proverbs. Learning even a handful of these words changes what you notice at a well or on a plant walk.

From there, the step to seeing Irish folk medicine in person is a short one.

Where Travellers Can Meet This Heritage

Ireland’s limestone west, particularly the Burren in County Clare, is where the plant side is easiest to see, with unusual botany and guided walks in the warmer months. The well complexes at Kildare town and Liscannor are straightforward to reach. Folk parks and heritage museums often hold herb gardens and reconstructed kitchens showing how remedies were made.

For quieter, wilder sites, the west and northwest repay the effort, and ConnollyCove’s guide to Connemara folklore is a good starting point for pairing landscape with story. Late spring and early summer suit both foraging walks and pattern days.

Conclusion

Irish folk medicine holds together two things modern habit keeps apart: working knowledge of plants and a community practice of care. Both are still there in the wells, the hedgerows and the archive, and neither needs a museum to survive. If you are travelling in Ireland, look for them rather than past them: read a few pages of the Schools’ Collection before you go, learn the names of three plants, and walk the rounds at one well. Start with our Celtic heritage guides below.

Explore More Irish Heritage

ConnollyCove is an Ireland-based travel and culture platform covering Irish heritage, Celtic mythology and destinations worldwide. Read our guides to Celtic gods and Celtic ritual, or watch our videos on the ConnollyCove YouTube channel for footage of Ireland’s sacred sites.

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