Rosacea as many other diseases have an hereditary component, but is composed by a series of factors that increase blood flow to the skin. Causes These are some of those factors: 1) Labor: great exposure to the sun, ovens, kitchens, saunas etc. 2) Drugs (viagra, corticosteroids, estrogens, antihypertensives) 3) Beverages (hot beverages, alcohol) 4) Meals (spicy meals) Rosacea usually has evolutionary phases. At first you only sees a reddening of the patient's face, which is followed by small vasodilations on the nose, cheeks, chin etc. These patients tend to have flash to sun exposure...