The common causes of itchy feet are the following: the most common is a skin cause, such as allergic dermatitis, which can cause itching in the heart of the foot. The second common cause is neurological, such as lumbar intervertebral disc herniation, after protrusion, backward pressure on the surrounding nerve roots, causing edema of the nerve roots, which can cause sensory disorders in the lower limbs or feet, which can cause itching in the heart of the feet. The third common cause is chronic disease, such as diabetes, which can cause sensory impairment of the peripheral nerves, and itching of the heart of the foot.