night sweat's legs only and only 23 years old

Hi,

You are too young to be having night sweats. However, this might be some kind of side effect. Are you using any medication right now? Because some medication can have side effects like this.

Second thing that can give you night sweats is hormonal imbalance in your body. Are you perhaps using birth control pills or any other form of hormones? I don’t think that this could be caused by pregnancy, but if you had unprotected sexual activities, you might even consider this as an option. How long is this going on? Have you talked with your mother if she ever experienced anything similar to this. It might be something in the family so it could be good idea to talk to her.