<s>[INST] I have athletes feet. And my heels are really callesed. And I have just noticed that their are these tiny holes about the size of a lead pencil on my heels. And my feet stay red all the time. What is causing my feet to stay red all the time and what is causing the holes in my heels? [/INST] Callousness results in ridges in the feet which may appear as tiny holes sometimes. However, if you are not satisfied with my explanation I suggest you show it to your dermatologist. Athletes foot is a fungal infection due to Tina FEDIS. 2 known causes of redness:1) Inflammation due to the worm. This is more for localized redness2) Vasodilation. This is related to inflammation as the body tries to fight infection by releasing protective cells from our blood stream to the affected tissue. For an increased number of cells the blood flow needs to increase which happens by vasodilation. Thus, an increase in blood flow leads to appearance of redness </s>