What causes dizziness and nausea after a sauna or sweat therapy?

Dizziness and nausea after a sauna session may be caused by excessive fatigue, dehydration, low blood sugar, hypoxia (oxygen deficiency), high blood pressure, or other reasons. Targeted treatment should be based on the specific cause. If dizziness and nausea persist or worsen, medical attention should be sought promptly. Specific details are as follows:

1. Excessive Fatigue

If adequate rest is not obtained before sauna use, or if excessive physical activity occurs during the session, it may lead to extreme fatigue, resulting in dizziness and nausea. Symptoms usually improve with appropriate rest.

2. Dehydration

Sauna sessions accelerate fluid loss through sweating. Without timely rehydration, dehydration may occur, causing dizziness and nausea. Drinking light salt water or electrolyte-containing beverages can help restore the body's fluid balance.

3. Low Blood Sugar (Hypoglycemia)

Not eating enough before a sauna may result in low blood glucose levels, leading to dizziness and nausea. Consuming foods rich in protein and carbohydrates, such as fruit or crackers, can help restore energy levels.

4. Hypoxia (Oxygen Deficiency)

Poor indoor air circulation during sauna use may reduce oxygen supply to the brain, causing dizziness and nausea. It is important to ensure proper ventilation during sauna sessions to prevent oxygen deficiency.

5. High Blood Pressure (Hypertension)

The heat from sauna causes widespread blood vessel dilation and increased blood flow, which may elevate blood pressure and trigger symptoms such as dizziness and nausea. In severe cases, antihypertensive medications may be used under medical supervision, such as losartan potassium/hydrochlorothiazide tablets, indapamide sustained-release tablets, or nifedipine sustained-release tablets.

When experiencing dizziness or nausea after a sauna, individuals should take appropriate measures according to their condition. Special populations such as elderly individuals, women during menstruation, and patients with asthma should avoid sauna use to prevent adverse reactions.