The exact cause of rosacea is still unknown. The basic process seems to involve dilation of the small blood vessels of the face. Currently, health researchers believe that rosacea patients have a genetically mediated reduction in the ability to dampen facial inflammation that is incited by environmental factors such as sunburn, demodicosis (Demodex folliculorum in the hair follicles), flushing, and certain medications. Rosacea tends to affect the "blush" areas of the face and is more common in people who flush easily. Additionally, a variety of triggers is known to cause rosacea to flare. Emotional factors (stress, fear, anxiety, embarrassment, etc.) may trigger blushing and aggravate rosacea. Changes in the weather, like strong winds, or a change in the humidity can cause a flare-up. Sun exposure and sun-damaged skin is associated with rosacea. Exercise, alcohol consumption, smoking, emotional upsets, and spicy food are other well-known triggers that may aggravate rosacea. Many patients may also notice flares around the holidays, particularly Christmas and New Year's holidays.
See Your Doctor If You Get Large, Deep Breakouts or Acne Cysts: While smaller blemishes can still scar the skin, it's the big guys that usually do the damage. Because they extend deeper into the skin, deep nodular breakouts or cystic breakouts are more likely to destroy skin tissue and leave scars. Over-the-counter acne products just won't help these types of breakouts. Get an appointment with a dermatologist. Quick, effective treatment can help lessen the chance of developing deep scars.
Drugs: Some medications may cause or worsen acne, such as those containing iodides, bromides, or oral or injected steroids (either the medically prescribed prednisone [Deltasone, Orasone, Prednicen-M, Liquid Pred] or the steroids that bodybuilders or athletes sometimes take). Other drugs that can cause or aggravate acne are anticonvulsant medications and lithium (Eskalith, Lithobid). Most cases of acne, however, are not drug related.