Smelly feet can be caused by many things like not washing properly or a fungal infection. It is not necessarily a sign of syphilis. Sometimes syphilis can cause sores on palms of the hands or feet but the ONLY way you can know if you have syphilis is to have a blood test, so go to your nearest clinic for this. Without treatment syphilis can affect your eyes, brain, heart and the rest of your body, so seek proper medical help soon if you are worried.
Attribution: Straight Talk Foundation