Rosacea, also known as rosacea, is a chronic inflammatory skin disease characterized by persistent erythema and capillary dilation, most commonly occurring in the midface. The specific etiology and pathogenesis of rosacea are not fully understood, but a variety of factors can trigger or aggravate the disease, such as local vasodilatory nerve disorders, repeated local infections, consumption of spicy and irritating foods, alcohol consumption, and hot and cold stimuli. The basic clinical types of rosacea include erythema capillarum, papulopustular, nasal flaccid, and ophthalmic types. Most patients with this disease are middle-aged and more often female, but those with severe disease are often male patients. In daily life, patients should avoid excessive cleaning of the skin, enhance moisturizing and sun protection, avoid drinking alcohol and eating spicy food, and apply cold compresses locally. For treatment, long-term maintenance or repeated and intermittent treatment is required, and anti-inflammatory and antiseptic drugs that can reduce erythematous papules and pustules can be used topically. If the papules and pustules are more serious, or if mites are detected, oral medication can be used in conjunction with the treatment. For those with obvious capillary dilation, laser treatment is generally more effective. The nasal flaccid stage can be treated with excision or grinding for cosmetic effect.