Box 1.

Causes of secondary localised and generalised hyperhidrosis

Causes of secondary localised hyperhidrosis	Causes of secondary generalised hyperhidrosis
Auriculotemporal syndrome (gustatory hyperhidrosis, triggered by eating and thinking about food) Spinal and peripheral nerve damage Surgical trauma Surgical sympathectomy Chronic anxiety Stroke and brain tumour3	Obesity Diabetes Infection Overactive thyroid Endocrine tumours Cardiovascular disease Parkinson’s Hodgkin lymphoma Menopause Respiratory failure Medications such as corticosteroids, cholinesterase inhibitors, opioids, and antidepressants1,3