[header] How to know if you have hyperhidrosis [title] Look for abnormal sweating. [step] Sweating is a completely normal process and an important way your body maintains a consistent temperature. However, if you find that you sweat much more often than seems appropriate, you may have hyperhidrosis. 
[substeps] Hyperhidrosis causes sweating in the absence of physical activity or stress. Sweating when your body is not actively trying to regulate your body temperature is the number one symptom of hyperhidrosis.