Rosacea
Rosacea is a chronic condition characterized by facial redness. Pimples are sometimes included as part of the definition. Unless it affects the eyes, it is typically a harmless cosmetic condition. Treatment in the form of topical steroids can aggravate the condition.
It primarily affects Caucasians of mainly northwestern European descent and has been nicknamed the 'curse of the Celts' by some in Britain and Ireland, but can also affect people of other ethnicities. Rosacea affects both sexes, but is almost three times more common in women. It has a peak age of onset between 30 and 60.
Rosacea typically begins as redness on the central face across the cheeks, nose, or forehead, but can also less commonly affect the neck, chest, ears, and scalp
*Zones
Cause
Triggers that cause episodes of flushing and blushing play a part in the development of rosacea. Exposure to temperature extremes can cause the face to become flushed as well as strenuous exercise, heat from sunlight, severe sunburn, stress, anxiety, cold wind, and moving to a warm or hot environment from a cold one such as heated shops and offices during the winter. There are also some food and drinks that can trigger flushing, including alcohol, food and beverages containing caffeine (especially, hot tea and coffee), foods high in histamines and spicy food. Foods high in histamine (red wine, aged cheeses, yogurt, beer, cured pork products such as bacon, etc.) can even cause persistent facial flushing in those individuals without rosacea due to a separate condition, histamine intolerance.
Diagnosis
Most people with rosacea have only mild redness and are never formally diagnosed or treated. There is no single, specific test for rosacea.
In many cases, simple visual inspection by a trained person is sufficient for diagnosis. In other cases, particularly when pimples or redness on less-common parts of the face are present, a trial of common treatments is useful for confirming a suspected diagnosis.
Treatments
Treating rosacea varies depending on severity and subtypes. A subtype-directed approach to treating rosacea patients is recommended to dermatologists. Mild cases are often not treated at all, or are simply covered up with normal cosmetics.
Rosacea: From Wikipedia,