People with rosacea should avoid...spicy foods, alcohol, coffee, and other caffeinated beverages.
Psoriasis persists throughout life but may come and go. Symptoms are often diminished during the summer when the skin is exposed to bright sunlight. Some people may go for years between occurrences. Flare-ups often result from conditions that irritate the skin, such as minor injuries and severe sunburn. Sometimes flareups follow infections, such as colds and strep throat. Flare-ups are more common in the winter and after stressful situations. Psoriatic arthritis produces joint pain and swelling.
Phototherapy (exposure to ultraviolet light) also can help clear up psoriasis for several months at a time. Traditionally, treatment has been with phototherapy combined with the use of psoralens (drugs that make the skin more sensitive to the effects of ultraviolet light). This treatment is called PUVA (psoralens plus ultraviolet A). Some doctors are now using narrow-band ultraviolet B (UVB) treatments, which are equally effective but avoid the need to use psoralens and the side effects they cause, such as extreme sensitivity to sunshine.
Nearly everyone with psoriasis benefits from skin moisturizers (emollients). Other topical agents include corticosteroids, often used together with calcipotriene, a vitamin D derivative, or coal or pine tar. Very thick patches can be
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thinned with ointments containing salicylic acid, which make the other drugs more effective.
Rosacea usually appears during or after middle age and is most common in people of Celtic or Northern European descent who have fair complexions. The skin over the cheeks and nose becomes red, often with small pimples. The skin may appear thin and frail, with small blood vessels visible just below the surface. The skin around the nose may thicken, making it look red and bulbous (rhinophyma), which is particularly
common in alcoholics. Occasionally, rosacea appears on the torso, arms, and legs rather than on the face. People with rosacea should avoid foods that cause the blood vessels in the skin to dilate – for example, spicy foods, alcohol, coffee, and other caffeinated beverages. Certain antibiotics taken by mouth relieve rosacea. Antibiotics that are applied to the skin are also effective. In rare cases, antifungal creams are used. Corticosteroids applied to the skin tend to make rosacea worse.