I've been to an endocrinologist last week, because the night sweating I was dealing with was becoming very uncomfortable.
It all started in November and it was once a week, and it gradually became more often and more distressing, in February I started having night sweating every night.
My night sweats aren't drenching, but I do get moist on my legs, wet on my chest, on my neck, around my underwear - wherever skin folds.
In January I began having hot flashes as well, especially around my period and when I was feeling emotional or angry or agitated, whatever.
I feared cancer, I feared diabetes, I feared going nuts, I worried about having a problem with my thyroid or maybe entering early menopause (I'm 28!).
The endocrinologist told me that Vitamin D deficiency can cause night sweats and hot flashes, as well as anxiety and insomnia. Vitamin D deficiency is quite widespread and it's often more symptomatic in winter, because you get much less sunlight (vit D is produced by the body when there is direct contact of sunlight with the skin).
So I started taking a Vit D supplement, 2000 UI / day and on the 2nd day of taking it my night sweating stopped. It's been 4 nights in a row and I didn't sweat any more. Perhaps it's yet too early to decide that my night sweats were Vitamin D related, but imagine I was sweating EVERY night and suddenly 4 nights in a row - nothing. I'm relieved to realize it's probably not a cancer.
Just saying, if you suffer from night sweats... before thinking of the worst, try taking some vitamin D!