Skin discoloration can be quite disconcerting if you do not understand the cause for it. Even if the etiological factor is benign, and the discoloration responds quickly to medications, yellow discoloration indicates that some process or a certain substance may be burdening the body. There are a host of factors responsible for the skin turning yellowish, and it is vital that you talk to your doctor to establish the cause.
Yellow discoloration of the feet tends to cause immense worry and apprehension. Thus, it is best that you visit your health care professional.