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Is the lesion present on both the feet? Do you have any itchy lesion anywhere else in the body? How long have you had it? Judging by the photographs (attachment removed to protect patient identity) and the limited history, I have come to the following conclusion. You have got a condition called lichen simplex chronicus. Apply Halovate S (Halobetasol) cream over the affected areas at night time. Apply a good rich moisturizer during the daytime like Venusia Max. Consult a dermatologist who can give you intralesional steroid injection for quicker resolution. You can continue eating fish, chicken and meat. It is unrelated to the skin condition.