A small baby with fever and rash is often seen in infectious diseases such as infantile rash or measles, often due to viral infections, and requires a visit to an infectious disease doctor. According to the pattern of fever and rash, you can generally determine the name of the disease, and then give the appropriate treatment measures, you can give antiviral treatment, if the fever is low, you can take oral Banlangen punch or antiviral oral solution. If the fever is high or if there are serious complications, antiviral drugs and antibiotics can be given on a drip basis, such as Xiyampin, acyclovir and penicillin. At the same time, skin care must be strengthened to prevent inflammatory skin infections, and care needs to be taken to isolate and avoid spreading the infection to others.