Itching sometimes inexplicably appears on the body in the following cases: 1, pruritus: mostly in the elderly, mainly due to the elderly cortical glands, sweat glands of the function of the decline, causing a reduction in sebum secretion, the skin surface protection is reduced and caused by an itch. In clinical treatment, you can take oral loratadine capsules once a day, one capsule at a time, and use topical stove glycol lotion for treatment. 2, wind mass and edematous erythema: and swelling at the skin mucosa, usually consider urticaria. It is caused by allergies or infections and other factors. The rash can rise for a while and disappear for a while, and there is no trace of it after it subsides. It can be treated clinically with oral Avastin capsules combined with Desloratadine capsules and topical application of Furfuracin lotion.