Without examination it is very difficult confirming a diagnosis but it can be seborrheic dermatitis or rosacea. Seborrheic dermatitis is a common skin condition that causes flaky, dry, white to yellowish scales to form on oily areas esp. under the nose or anywhere on face. Rosacea is a cutaneous disorder primarily of convexities of the central part of the face, such as forehead; cheeks; nose; and chin. Pimples are sometimes included as part of the definition.
Treatment options vary from antibiotic creams, antihistaminics, sun screens to laser treatment. A dermatologist’s evaluation will be the best in differentiating the two.
I hope it helps. Take care and please do keep me posted in case you have any additional doubts. Kind regards.