A patch of rough skin like ringworm that does not hurt or itch may be caused by dry eczema, pityriasis rosea, perioral keratosis, and other diseases. It is recommended to take good care of the skin, give topical ointment, and treat with oral medication if necessary. 1. Dry eczema: dry eczema occurs with excessive water loss and reduced sebum secretion, resulting in dry and cracked skin that looks like ringworm. It is recommended to pay attention to the moisturizing of the skin and use hydrocortisone butyrate cream externally, which can promote the skin damage to subside. 2. pityriasis rosea: pityriasis rosea is an acute inflammatory skin disease that tends to occur on the trunk and limbs. If the patient does not have any uncomfortable symptoms, it can be closely observed. If the skin is itchy, topical glycerine lotion and dianabed cream can be used, which have the effect of anti-inflammatory and anti-itching. 3. Keratosis Pilaris: Keratosis Pilaris is related to heredity, which is mainly manifested as thickening of keratin around the hair follicles, resulting in small localized bumps. Keratosis pilaris may affect the beauty of the skin, and can be treated with retinoid topical medication under the guidance of a doctor. Other causes of the above symptoms cannot be ruled out. It is recommended that patients go to the dermatology department of the hospital to get a clear diagnosis, and under the guidance of the doctor for the cause of the symptomatic treatment, do not self-medication.