What should you know about excessive sweating all over the body?

Sweating over the face, chest, back, arms and legs is different from sweating limited to one area. It may follow heat, exertion, anxiety or an inherited sweating tendency, but a new widespread pattern can also accompany fever, hormonal changes, an overactive thyroid, low blood glucose, sleep-related breathing problems or a medicine effect. Night sweats, weight change, racing heartbeat, tremor or unusual thirst give useful context. The pattern is a clue rather than a diagnosis, so timing and associated symptoms matter.

Note the start date, body areas, sleep symptoms, temperature, activities, food, alcohol and medicines around each episode. Drink fluids regularly and replace damp clothing, while avoiding heavy exertion in hot conditions. Arrange a clinical review when the change persists, interrupts sleep or affects daily life; bring the diary and a full medicine list. Treatments aimed at one area, such as injections, iontophoresis or microwave sweat gland treatment, may not suit widespread symptoms, so identifying a trigger comes first.

Seek urgent help if widespread sweating occurs with confusion, fainting, severe dizziness, chest discomfort, breathlessness, severe weakness or inability to drink. After heat exposure, headache, nausea, cramps or altered alertness can signal heat illness. Sweating with shaking, blurred vision or marked weakness may accompany low blood glucose. Contact a clinician promptly for repeated night sweats, a sudden unexplained change or symptoms such as racing heartbeat and tremor.

What causes should we consider for sweating across my body? Could a medicine, thyroid problem, glucose change or sleep issue contribute? Do I need an examination or tests? Which measures are safe while we investigate?