### What is a Morbilliform Rash? A morbilliform rash is a type of skin rash that looks similar to measles. The term 'morbilliform' means 'measles-like.' Dermatologists sometimes refer to these rashes as morbilliform eruptions. ### Causes Many viral illnesses can cause this type of rash. Additionally, both children and adults can develop morbilliform rashes after taking a new medication. When caused by drugs, they are called 'morbilliform drug eruptions.' Common causes include: - Viral infections like Epstein-Barr virus, herpesvirus, and COVID-19 - New medications, especially antibiotics - Respiratory illnesses - Arboviruses spread by mosquitoes or ticks - Other medical conditions like Kawasaki disease or graft-versus-host disease (GVHD) ### Symptoms The rash often starts on the chest and spreads to the arms, legs, and neck. It appears as flat pink or red spots that may merge together and become bumpy. The rash may be harder to see on darker skin tones. It can be itchy and may be accompanied by a fever. ### When to See a Doctor If you or your child develops a morbilliform rash, especially if you suspect it could be measles, see a doctor immediately. Measles is highly contagious and can lead to serious complications. ### Diagnosis A dermatologist can easily identify a morbilliform rash but will need to determine the underlying cause. This involves a physical exam, medical history, and possibly tests to identify any viral infections or reactions to medications. ### Treatment Treatment depends on the cause. If a viral illness is responsible, the rash may go away on its own as you recover. If a medication is the cause, you should stop taking it under your doctor's guidance. Never stop taking a necessary medication without consulting your doctor. Treatment may include: - Antihistamines for itching - Topical steroids for inflammation - Stopping the offending medication ### Conclusion While a morbilliform rash is often mild and resolves on its own, it's important to identify the cause to treat any underlying conditions or avoid triggers. If you suspect measles, seek medical attention immediately.