What does it mean when you sweat all of a sudden for no reason?

Sudden onset of sweating for no apparent reason is called diaphoresis, or a sweat attack.**

Possible Causes of sudden sweating

Underlying medical conditions:

- Menopause

- Hyperthyroidism

- Diabetes

- Heart disease

- Certain cancers

- Infections (e.g. tuberculosis)

- Neurological conditions (e.g. Parkinson's disease)

Medications:

- Certain antidepressants

- Antipsychotics

- Chemotherapy drugs

- Steroids

- Blood pressure medications

Other factors:

- Stress

- Anxiety

- Hot flashes

- Spicy food

- Alcohol consumption

- Smoking

- Caffeine intake

- Dehydration

- Intense exercise

When to see a doctor:

- Sudden onset of profuse sweating

- Accompanied by other symptoms such as chest pain, shortness of breath, dizziness, nausea or vomiting

- Persistent or unexplained sweating

- Interfering with daily activities

Self care:

- Stay hydrated

- Wear loose, lightweight clothing

- Use a fan or air conditioning

- Take a cool shower or bath

- Avoid spicy foods, caffeine and alcohol

- Practice relaxation techniques (yoga, meditation)

- Try stress management techniques (exercise, deep breathing)