The causes of vulvar itching and redness are quite varied, and the common causes are external stimulation, contact dermatitis, vaginitis, etc. If caused by external stimulation, we should pay attention to the private hygiene, change loose clothing and so on. Contact dermatitis, vaginitis and other causes need to be clearly diagnosed and treated. 1. External stimulation: Personal bad habits, such as not paying attention to private hygiene, the use of substandard sanitary products or underwear is too tight, etc., can produce stimulation of the vulva, resulting in itching and redness, usually need to pay attention to personal hygiene, the use of non-stimulating sanitary products, if the redness and swelling is not relieved, need to consult a doctor for treatment. 2. Contact dermatitis: it is an inflammatory reaction formed after the vulva receives stimulating factors, you need to stay away from allergic substances, and in serious cases, you can use topical hydrocortisone and other glucocorticosteroid drugs to achieve anti-inflammatory and anti-allergic effects, and please follow the doctor’s instructions for the use of medication. 3. Vaginitis: it can be caused by bacteria, mold, trichomonas, etc., resulting in increased vaginal secretions, stimulation of the vulva caused by inflammation, which can be manifested in vulvar itching, burning, redness and swelling, etc., according to the different types of pathogens, you can choose different antimicrobial drugs for treatment. Vulvar itching and redness need to consider a lot of factors, it is recommended to consult a doctor in a timely manner, the doctor to clarify the cause of treatment.