Why some people sweat even when they’re not hot?
Many people assume sweating only happens when the body becomes too warm. In reality though, sweat production is controlled by the nervous system and can be triggered by a variety of factors.
Author: Dr. Sreedhar Krishna
Date: 22.10.2026
Why some people sweat even when they’re not hot?
Many people assume sweating only happens when the body becomes too warm. In reality though, sweat production is controlled by the nervous system and can be triggered by a variety of factors which is why some people find themselves sweating heavily while sitting indoors, working at a desk or even relaxing at home.
What causes excessive sweating?
Hyperhidrosis causes the sweat glands to become overactive, producing more sweat than is needed to regulate body temperature. This commonly affects the underarms, palms, soles of the feet and face. Stress, anxiety, hormonal changes and certain medications can also contribute.
Could hyperhidrosis be linked to my lifestyle?
Caffeine, spicy foods and alcohol can all increase sweat production in some people. Emotional stress is another common trigger and the sweating may get worse before social events, meetings or situations when the pressure is on.
When should people seek medical advice about hyperhidrosis?
There’s little need to worry if it’s been a lifetime condition, although it can be inconvenient and embarrassing. A sudden increase in sweating however, shouldn’t be ignored. Excessive sweating that occurs mainly at night, develops unexpectedly or is accompanied by symptoms such as weight loss, constant tiredness or palpitations may be more of a problem and the individual so should be seen by a dermatologist or GP.
What treatments are available?
Treatment for excessive sweating depends on the cause and severity of symptoms. Prescription-strength antiperspirants can be very effective for some people but other options can include tablets, iontophoresis treatments for the hands and feet, and injectable treatments that temporarily reduce sweat production. Lifestyle adjustments may also help.
Final thoughts
Excessive sweating is far more common than many people realise and can have a significant impact on confidence and daily life. The good news is that there are effective treatments available if sweating is affecting quality of life.
Dr Sreedhar Krishna is a UK-based Consultant Dermatologist with a specialist clinical focus on acne, including the safe prescribing and monitoring of isotretinoin and other systemic acne treatments. He is the Chief Medical Officer and co-founder of skindoc, a consultant-led dermatology service providing both in-person and online care. His work centres on evidence-based acne management, patient safety, and maintaining high clinical standards in UK digital dermatology.
