If you've ever experienced a rash, painful, or itchy skin after using a skin-care product, you may have an allergy to one of ...

food allergies, or hay fever or if any of these conditions run in the family. Doctors aren’t totally sure what causes this skin condition. In infants, it shows up as a rash on the face or head.

What are skin allergies? How do they happen? What type of jewelry is most likely to cause a reaction? WebMD tests your knowledge of skin allergies.

Symptoms were categorized as oral allergy syndrome (OAS) (grade IA), OAS with conjunctivitis or rhinitis (grade IB), isolated gastrointestinal or skin symptoms ... of the face, mouth, tongue ...