Is there a flat red pimple on the face when the weather is cold in winter?

Hello! According to your above situation, the initial consideration is allergic dermatitis, but it must be checked before the diagnosis can be made. Treatment is mainly based on the specific causes of combining topical drugs and oral drugs to avoid allergens. Pay attention to skin care in dry weather. It is recommended to go to the hospital to see a doctor for a definite diagnosis and use drugs correctly under the guidance of a doctor. Don't use drugs blindly, so as not to aggravate the condition and increase the difficulty of treatment.