What it is
The minor form affects only the skin. The major form also affects the lips, mouth, eyes or genitals.
Treatment eases symptoms with antihistamines, creams and mouthwashes. If cold sores trigger repeated episodes, antiviral tablets may prevent them.
Common signs
- Raised spots that look like targets, often on the hands, feet, arms and legs
- Itching or burning
- Blisters or sores on the lips and in the mouth (major form)
How it is usually diagnosed
- Recognised by how the rash looks
- Skin biopsy in some cases
Records worth keeping
Keeping these together makes each appointment easier, especially when you see a new doctor:
- Photos of the rash with dates
- Notes on triggers such as cold sores or new medicines
- Dermatology letters
Questions to ask your doctor
- What triggered it?
- Should I take antiviral tablets to prevent it?
- How do I tell it from a more serious drug reaction?
When to get help right away
Call 112 or go to the nearest emergency department if you have:
- Widespread blistering or peeling skin, sore eyes, or a rash after starting a new medicine with fever: get urgent help
This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.