How should small red a knot grow on the foot very itch to do

Feet with small red pimples are itchy. There are several conditions as follows: 1. It may be eczema, which is caused by allergy. It may be allergic reaction caused by wearing plastic slippers or rubber rain boots. In treatment, first of all, it is necessary to prevent contact with the above allergic substances; secondly, oral desloratadine capsules, one capsule every night, combined with compound glycyrrhizin capsules, 3 times/day, 2 capsules/time, topical desonide ointment 1:1 mixed with black bean distilled oil, 2 times/day. 2, consider fungal infection caused by tinea pedis, can also be accompanied by small blisters, can also show immersion whitening between the toes, at this time need to take itraconazole capsules, 1/day, 2 capsules/time, oral half a month to a month, while external use terbinafine hydrochloride gel, 2 times/day, appropriate external use. For immersion, whitening and erosion, can be external application of 2% boric acid solution for treatment.