Does hypoglycaemia cause excessive sweating?

When glucose falls, the body releases hormones that encourage the liver to release stored energy. Those hormones can also cause clamminess or sudden sweating, along with shaking, hunger, a fast heartbeat, dizziness, irritability, or difficulty concentrating. The sweating may start before more obvious signs appear. Other causes of sweating include heat, exercise, anxiety, infection, medicines, and hormone changes, so sweating alone cannot identify the cause.

People who use insulin or certain glucose-lowering medicines may be more familiar with episodes of low blood glucose. A clinician can help connect the timing of symptoms with meals, activity, medicines, and glucose readings.

If you are awake and able to swallow, stop the activity, check your glucose if you have a meter, and follow the low-glucose plan given by your healthcare professional. This commonly involves taking a fast-acting source of glucose, then rechecking as advised and eating a longer-lasting snack if needed. Do not drive while symptoms continue. Keep your treatment plan and a suitable glucose source accessible, and record triggers or repeated episodes for review.

Get emergency help if sweating is accompanied by confusion, unusual behaviour, fainting, a seizure, inability to swallow, or loss of consciousness. Do not give food or drink to someone who is unconscious or having a seizure. Repeated episodes, symptoms that do not improve with the agreed plan, or episodes without an obvious explanation need prompt medical assessment.

Ask what glucose level and symptoms should trigger your personal action plan, whether any medicines or meal patterns could be contributing, and when you should change or review your monitoring routine.