The very red and painful pubic area of Xiaobao may be caused by trauma, infectious factors and allergic factors. 1. trauma: for example, the pubic area suffered a foreign body stimulation or external force, resulting in damage to the pubic area, it will make the pubic area red, accompanied by obvious pain and swelling. 2. Infection: children do not pay attention to the lower body hygiene, may lead to infection in the pubic area, after the increase of inflammatory substances, the pubic skin caused by stimulation, will cause redness and pain, accompanied by itching. 3. Allergic factors: such as the use of some stimulating toiletries, resulting in allergic reactions to the skin in the pubic area, there will be redness and stinging symptoms, there will also be intense itching. Little treasure pubic area is very red and painful, may be the existence of abnormal conditions, parents are advised to take their children to the doctor for consultation and treatment, to avoid aggravation of the condition.