The exact cause of rosacea is not known. The basic process seems to involve dilation of the small blood vessels of the face. It can be due to genetic causes, hormonal problems, the bacteria Helicobacter pylori (that is associated with stomach ulcers), gastrointestinal disease, and medications that cause blood vessels to widen.
Treatment options vary from antibiotic creams, antihistaminics, sun screens to laser treatment. A dermatologist’s evaluation will be the best.
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 doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.