Painful rash on the right foot started 6 weeks ago.Getting worse and worse. He deny shoes changing or special soaks wearing history during past year.Examination & Findings 检查 & 发现A round and yellow hyperkeratotic plaque with smooth surface on the inner skin of right 5th toe, the skin around the lump also has rough and hyperkeratotic callus.The similar thinner hyperkeratotic plaque on the lateral skin of right 4th toe, and the right 5th toe is overlap together with the right 4th toe naturally.Assessment & Plan 评估 & 计划Explanation for the skin condition and treatment method.Remove the hyperkeratotic plaque from towo toes by paring.Skin care education.Follow up as needed.