There are many reasons for red itchy face with small bumps, such as eczema, allergic diseases, ringworm, acne, frostbite, prickly heat and so on. 1. Eczema: Inflammatory reaction of the skin caused by internal and external stimulation of various factors, eczema on the face can also lead to red itchy face with small bumps. 2. Allergic diseases: contact dermatitis, drug rash, insect bite dermatitis and other allergic diseases, can also lead to red itchy face with small bumps. 3. Ringworm: Fungal infections that cause ringworm may also cause redness and itchiness. 4. Acne: Androgen-induced increase in sebaceous gland secretions in the hair follicles can lead to acne, which may also cause redness and itchiness of the skin with small bumps. 5. Frostbite: The outside temperature is too low, resulting in poor circulation in the local skin, the formation of frostbite, can also cause redness and itching with small bumps. 6. prickly heat: the outside world temperature is too high to cause poor sweating, may also cause prickly heat, resulting in red itchy face with small bumps. There may be other reasons for the redness and itchiness, so you need to go to the hospital in time and follow the doctor’s instructions for treatment.