Common childhood infectious diseases are the following: 1, measles, it is caused by measles virus infection, mostly seen in children who have not been vaccinated on time for measles, usually with a fever, fever 3-4 days after the rash, more intense fever during the rash, the mouth can have measles mucosal spots. 2, chickenpox, it is caused by varicella-zoster virus infection, usually manifested as a generalized type of blister-like rash, localized itching. It is usually a generalized blister-like rash with localized itching. 3. Hand, foot and mouth disease has become popular in recent years, usually manifesting as herpes in the oral cavity and throat, with rashes on the hands, feet, buttocks and knees, and is an acute febrile rash caused by enterovirus infection. 4. Mumps is more common and is caused by mumps virus, with diffuse swelling and amylase elevation under the ear. 5. In severe cases, there is also cornual tuberculosis, and atypically, there are tuberculosis infections, etc.