Certain medications themselves can trigger or aggravate rosacea signs and symptoms, according to Dr. John Wolf, chairman of dermatology at Baylor College of Medicine.
"Rosacea can worsen for some patients from taking vasodilator drugs because of their ability to dilate the blood vessels," he said. "Beta blockers and niacin (vitamin B3) may also cause blood to rush to the face, resulting in a rosacea flare-up."
A. A rosacea flare-up is characterized by a more intense outbreak of redness, bumps or pimples. For some sufferers, the bumps caused by rosacea may resemble mosquito bites. For others, these bumps are generally redder in appearance. It is not uncommon for rosacea patients to itch from dry skin, which can be helped by using a moisturizer.