How to Determine if It's a Drug Rash

Generally, a drug rash can be identified through methods such as reviewing the medication history, skin examination, assessing systemic symptoms, laboratory tests, and drug withdrawal trials.

1. Review of medication history: Determine whether the patient has taken any new medications within the 1–3 weeks before the rash appeared. If a rash appears shortly after starting a medication, it is more likely that the medication has caused the drug rash.

2. Skin examination: The doctor will perform a detailed examination of the rash, assessing its distribution, appearance, severity, and whether there are specific types of rashes, such as fixed drug eruptions or erythema multiforme.

3. Systemic symptoms: In addition to skin symptoms, there may be accompanying symptoms such as fever, joint pain, and swollen lymph nodes.

4. Laboratory tests: Blood tests and allergy testing may be required to rule out other diseases and confirm the diagnosis.

5. Drug withdrawal trial: Under a doctor's supervision, the suspected allergenic medication will be discontinued, and changes in the skin reaction will be observed.

If symptoms of a drug rash occur, it is recommended to seek timely medical evaluation to identify the cause and receive targeted treatment. When using any medication in daily life, one should always follow medical instructions to avoid adverse bodily reactions.