Hot Spring Contraindications | Conditions & Situations to Avoid Bathing

General Contraindications (All Spring Types)

• Acute illness (especially if feverish)Bathing in hot water can raise your body temperature and put additional strain on your system. If you are already feverish or unwell, this can worsen your condition and hinder your body's natural recovery process. It is best to wait until you have fully recovered before visiting an onsen.
• Active tuberculosisThis is a serious infectious disease that weakens the body, particularly the respiratory system. The physical stress of hot water immersion can be detrimental to a person already fighting such a severe infection. For your own safety, onsen bathing should be avoided until the condition is no longer active.
• Malignant tumoursIndividuals with cancerous growths are often in a physically delicate state, and their treatment can also be taxing. The increased body temperature and metabolic changes from hot spring bathing could place undue stress on the body. It is crucial to consult with your doctor before considering onsen bathing.
• Serious heart diseaseImmersion in hot water causes significant changes in blood pressure and circulation, forcing the heart to work harder. For individuals with a severe heart condition, this sudden strain can be dangerous and may lead to serious complications. Always follow the advice of your cardiologist regarding onsen bathing.
• Respiratory failureThe hot, humid air and the physical pressure of the water on the chest can make breathing more difficult. For someone whose respiratory system is already compromised, this added stress can be hazardous. It is essential to avoid onsen bathing to prevent worsening your condition.
• Kidney failureThe body undergoes significant fluid and electrolyte shifts during hot spring bathing due to sweating and changes in circulation. For individuals with impaired kidney function, the body may not be able to manage these changes effectively, leading to potential complications. Medical consultation is essential.
• Bleeding disordersHot water bathing increases blood flow by dilating blood vessels, which could potentially increase the risk of bleeding in individuals with these conditions. It is a precautionary measure to avoid situations that might exacerbate bleeding tendencies. Always consult your physician before bathing.
• Severe anaemiaAnaemia means having a lower than normal number of red blood cells, which can cause dizziness and fatigue. The heat and changes in blood pressure from onsen bathing can worsen these symptoms and potentially lead to fainting. It is important to avoid bathing until your condition has improved.
• Pregnancy (especially first and third trimesters)Bathing in hot water can significantly raise the body's core temperature, which may pose risks during the critical developmental stages of early pregnancy. In the final trimester, the physical changes and risk of dizziness also make bathing a concern. Always consult your doctor for guidance.

Contraindications by Spring Type

Mandatory Posting of Contraindications

Under Article 18 of the Hot Spring Act, facilities must display contraindications and bathing precautions in a clearly visible location. Always read the posted notices before bathing. When trying a spring type for the first time, start with a short soak to gauge your body's reaction.