Hello,
This redness of face can be due to blushing , rosacea or lupus if the redness predominantly involves the nose. Rosacea is a cutaneous disorder primarily of the central part of the face , such as forehead; cheeks ;nose; and chin presenting with redness, swelling, discoloration and sometimes pimples and dry skin over the cheeks, nose, chin or forehead.
Avoid the sun and hot weather, spicy foods, alcohol, and hot beverages. Also try to reduce stress as it may precipitate attacks. If the symptoms persist then specific medicines need to be prescribed.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
There are different ways to treat Rosacea if that's what you have. You need to confirm with a dermatologist or a doctor though.