Summer hand dry rough cracks may be caused by skin dehydration, but may also be eczema, ringworm and other diseases caused by the need to choose the appropriate treatment according to the cause of the disease, the specific analysis is as follows: 1. Skin dehydration: summer weather is hot, skin dehydration leads to dry and rough cracks, first of all, you need to pay attention to more moisture, and then use hand cream or moisturizing milk, such as vitamin E milk. 2. Eczema: mainly chronic eczema, you can apply petroleum jelly or silicone oil, etc., to alleviate dry skin, rough symptoms, if the cracking symptoms are obvious, you can use salicylic acid and other exfoliators, while avoiding contact with alkaline substances to prevent symptoms from worsening. 3. Ringworm: mainly keratinized cracked ringworm, can be applied externally to alleviate and improve the symptoms, such as terbinafine hydrochloride cream, buprenorphine cream, bifonazole cream, etc., the symptoms of serious cases can be combined with oral antifungal drugs, such as itraconazole capsules. The above drugs need to be used under the guidance of a doctor, it is recommended that patients seek medical advice in a timely manner, under the guidance of a doctor to confirm the cause of the disease for targeted treatment.