Your doctor will perform a physical examination. He or she will ask questions about your medical conditions, medications, health problems that run in your family, and recent illnesses or exposures. Questions may include:
When did the rash begin? What parts of your body are affected? Does anything make the rash better? Worse? Have you used any new soaps, detergents, lotions, or cosmetics recently? Have you been in any wooded areas recently? Have you had any change in your medications? Have you noticed a tick or insect bite? Have you eaten anything unusual of late? Do you have any other symptoms like itching or scaling? What are your underlying medical problems? Do you have, for example, asthma or allergies?
Tests may include:
Allergy testing Blood tests Skin biopsy Skin scrapings
Depending on the cause of your rash, treatments may include medicated creams or lotions, medications taken by mouth, or skin surgery.
Many primary care providers are comfortable dealing with common rashes, but for more complicated skin disorders, a referral to a dermatologist may be necessary.
What to expect if I have Rash  (Outlook/Prognosis)?
Your doctor will perform a physical examination. He or she will ask questions about your medical conditions, medications, health problems that run in your family, and recent illnesses or exposures. Questions may include:
When did the rash begin? What parts of your body are affected? Does anything make the rash better? Worse? Have you used any new soaps, detergents, lotions, or cosmetics recently? Have you been in any wooded areas recently? Have you had any change in your medications? Have you noticed a tick or insect bite? Have you eaten anything unusual of late? Do you have any other symptoms like itching or scaling? What are your underlying medical problems? Do you have, for example, asthma or allergies?
Tests may include:
Allergy testing Blood tests Skin biopsy Skin scrapings
Depending on the cause of your rash, treatments may include medicated creams or lotions, medications taken by mouth, or skin surgery.
Many primary care providers are comfortable dealing with common rashes, but for more complicated skin disorders, a referral to a dermatologist may be necessary.