Skin roughness and dullness may be caused by long-term exposure to ultraviolet radiation, excessive late-night physiological factors, or pathological factors such as ichthyosis and other diseases, need to take general measures for the cause of the disease, medication and other ways to improve. 1. Physiological factors: long-term exposure of the skin to ultraviolet radiation, excessive late at night, emotional fluctuations, irregular diet, may lead to skin roughness and dullness. In such cases, patients need to do a good job of sun protection and maintain a good routine. Apply appropriate sunscreen, as well as moisturizing cream, can improve this symptom. 2. Ichthyosis: rough and dull skin may also be caused by ichthyosis, patients can follow the doctor’s instructions for the external use of urea cream, lactic acid ointment and other keratin softeners, or external use of vitamin A acid drugs, such as vitamin A acid ointment, adapalene gel. The symptoms of the disease can be improved with medication. There are many reasons that lead to rough and dull skin, and it is recommended that patients go to a regular hospital, identify the cause of the disease, and follow the doctor’s instructions for medication.