Consider causes such as pruritus senileis and diabetic foot. Age-related pruritus is most often triggered by the patient’s reduced sebaceous gland function, reduced sebum secretion, dry and degenerative skin atrophy or excessive washing and scalding. After soaking the feet in excessively hot water, age-related pruritus is easily triggered and itching of the back of the feet occurs. In addition, if the patient suffers from an underlying condition such as diabetes mellitus, the itchy dorsum of the foot can occur as a complication of diabetic foot.