Sweating around the neck may be a symptom of primary focal hyperhidrosis, according to WebMD. One characteristic of primary focal hyperhidrosis is excessive sweating in a specific location on the body. Sweating in general can be a symptom of thyroid problems, diabetes or an infection.
People who suffer from primary focal hyperhidrosis are usually healthy, and it does not pose additional medical risks, notes WebMD. Medical professionals hypothesize that a nervous system error is the cause of the disorder, and there is some research that shows it may run in families. Primary focal hyperhidrosis can be an inconvenience in the lives of those with this condition.