If you have a genetic predisposition for sweaty feet, then it should not be a matter of concern. However, if you feel that you have recently developed the condition, it might be a symptom of some sort of medical problem. Examples of such complications are an overactive thyroid, lymphoma, leukemia, infections, heart diseases, etc. Sweaty feet can be caused by the ill-impacts of some medicines that you are taking as well. Many women develop this as they approach menopause.