Fever and rashes — these are signs of many infectious diseases. They may appear singly or may be combined together.
Fever — is to increase the temperature of the body, the protective reaction to infection, inflammation, allergy, etc.
The rash can be the result of a viral or bacterial infection, skin irritation, parasitic diseases (eg scabies), allergic reactions, reactions to medications, etc.
If you have these manifestations, then you need to see a doctor. With fever, if the temperature is not too high, you can refer to the therapist. The same doctor is contact if fever accompanied by a rash. If you have a rash on the body of an unknown origin, it is better to contact to a dermatologist.