A rough patch on your child’s leg resembling ringworm may be caused by a vitamin deficiency, ichthyosis, or localized dermatitis, which can be treated with vitamin supplements and the application of compounded lactic acid cream and dieldrin cream. 1. lack of vitamins: due to the child’s intake of vitamins and water deficiency, may lead to a piece of rough legs similar to the symptoms of ringworm, parents should let the child to eat more vitamin-containing vegetables and fruits, drink more water, and maintain a certain degree of indoor humidity. If necessary, under the guidance of the doctor for vitamin supplementation treatment. 2. ichthyosis: ichthyosis is mostly considered and hereditary or own gene mutation related, the child’s body immunity is weakened, easy to cause immune skin abnormality, which appeared on the child’s legs a rough similar to the symptoms of ringworm. Can follow the doctor’s instructions to the child affected area coated with compound lactic acid cream, vitamin B6 ointment, etc. for moisturizing, relieve the symptoms of itching. 3. Localized dermatitis: children’s skin is relatively fragile, inflammatory diseases may lead to rough skin with symptoms similar to ringworm, which can be relieved by applying Denadyl cream. When the child’s legs appear a rough piece of symptoms similar to ringworm, may also be other causes, it is recommended to go to the hospital in a timely manner, a clear diagnosis, under the guidance of the doctor for treatment.