It is very likely that the answer to this question lies in some of your medical history. For example, I have a condition called hypothyroidism which causes my body to overproduce heat, leading to sweating on my feet. A new treatment I am having success with involves prescribing daily doses of potassium iodine which will help regulate production of perspiration and potentially prevent sweating on your feet. The test results are positive for this diagnosis, but it may be worth asking your doctor about further testing and medication options that could help you stop or at least control excessive sweating under certain circumstances. Your doctor can also recommend other treatments such as antiperspirants if they feel these products would help you more than others.
How many people suffer from foot sweat?