How does baby rash cause it?

Infants show red rash, more common are two types. The first type is allergy or due to this thick clothing, sweating more, heat caused by this rash, mainly on the trunk or limbs showing red patches, or red small pimples, accompanied by some itching, the baby will cry. The second type is caused by viral infection. Generally speaking, there will be a respiratory prodromal symptom, such as cough, runny nose or low fever, and then this kind of rash or blistering rash will be displayed all over the body. Specifically, which kind of rash should be seen by a doctor in the hospital to evaluate which type of rash is and then carry out symptomatic treatment.