Balneotherapy and Peat Therapy Explained Simply

1. What It Is About

Balneotherapy involves people bathing in natural healing water, drinking it or inhaling it. Mud therapy involves applying warm mud or sludge to the skin, either as a pack or bath. Mud is a soft, dark paste made from decomposed plant material that has formed over a very long period. Such treatments have been used for a long time in spa resorts. They are carried out in clinics, rehabilitation facilities or on an outpatient basis. The water may contain sulphur, salt or radon; radon is a naturally occurring gas. During bathing, three factors interact: the warmth, the pressure and movement of the water, and the substances dissolved in it. Because each healing water has a different composition and each spa treatment follows a different procedure, results from different locations are difficult to compare. A spa treatment usually lasts two to four weeks, with bathing sessions several times a week. The main outcomes measured are pain intensity, mobility and overall well-being.

2. What Studies Show

The best-studied conditions are joint, muscle and back pain. In rheumatoid arthritis, an inflammatory joint disease, 60 people received fifteen baths in natural radon-carbon dioxide water or fifteen baths in artificial carbonated water 2. Six months later, the radon group reported less pain and better ability to cope with daily life; the comparison group had returned to their initial state. In a larger study involving 681 people with chronic back pain, osteoarthritis, rheumatoid arthritis or Bechterew’s disease, those who received radon baths reported less pain and required fewer painkillers after six months 5. Their overall condition did not change. In Bechterew’s disease, an inflammatory spinal condition, a study compared 60 people: one group received daily warm baths and exercises for three weeks, the other only did the exercises 7. After three weeks, pain and mobility were better in the bathing group, with some benefits still present after 24 weeks. In chronic back pain, a study of 102 people after a three-week spa treatment found improved mobility and reduced pain 6. After nine months, pain and painkiller use were still slightly lower than before, but mobility had returned to baseline. In hand osteoarthritis, a study using sulphur-rich water showed reduced pain, increased grip strength and improved hand function after three weeks; some benefits were still measurable after six months 3. In fibromyalgia, a condition characterised by widespread pain and fatigue, 24 women reported less pain and better sleep after three weeks of baths 8. In knee osteoarthritis, a large study found that more people achieved significant improvement after a spa treatment compared to a comparison group 1. In psoriasis, observational studies reported fewer symptoms; these are indications but not yet confirmed 4. Overall, the improvements were noticeable for participants and often lasted several months.

3. What Remains Unclear

Many studies are small and conducted at a single location. Often, there is no comparison group receiving a bath without healing water, such as tap water. It is therefore difficult to determine how much of the improvement is due to the healing water and how much is due to the spa treatment itself: the relaxed daily routine, relaxation, the holiday feeling and contact with others. Little is also known about the mechanisms of action. There are indications from animal and cell studies that sulphur in the water may reduce inflammation. Whether this applies to humans remains a hypothesis. It is also unclear whether warmth alone is sufficient. Few studies have examined outcomes after six to twelve months. There is no uniform definition of what constitutes balneotherapy, making it difficult to compare studies from different spa resorts.

4. What This Means in Everyday Life

Anyone considering a spa treatment or mud packs can expect noticeable but time-limited relief, especially for joint, muscle and back pain. The studies almost never compared these treatments with other approaches such as physiotherapy or medication, so it is unclear whether they provide additional benefits. In the studies, participants almost always had chronic conditions and continued their usual treatment and exercises. The baths were therefore one component, not the sole treatment. The studies report mostly no serious side effects. Local skin irritation from sulphur-rich waters and circulatory strain from very hot baths are mentioned. However, side effects were rarely systematically recorded. The next steps to clarify are whether the effects are due to substances in the water or to warmth and the spa routine, and how long benefits last beyond six months.

All details with study numbers and sources: detailed page on balneotherapy and mud therapy. For children: Balneotherapy and mud therapy for children.