Hello there. Surely your problem must be quite a disabling one. What you might be having is a plantar fascitis. This problem presents commonly as pain over the sole of the foot, particularly over the region oft he heel, more in the mornings and subsides over the day. The pain is quite unbearable sometimes and people find walking at the start of the day really difficult. Its also associated with another bony spur over the heel and associated inflammation of your achilles tendon. Generally people with flat foot are more predisposed to have this problem. Personally i have this problem as well. Changing your footwear to something with a soft sole really helps, there is also a role of some physiotherapy which can help you. If it is really bad to start off with i generally prescribe my patients a course of Aceclofenac 100 mg. The footwear modification i tell my patients to get is made of MCR or microcellulised rubber footwear.