Red bumps appeared on the face overnight and are very itchy.

Red, itchy bumps appearing on the face overnight are mostly caused by acne, allergic dermatitis, folliculitis, or similar conditions. Patients can adopt corresponding treatments based on their specific condition, as detailed below:
1. Acne
If the patient is in puberty, increased secretion of androgens may lead to overactive sebaceous glands. Excess oil can clog hair follicles, resulting in acne and causing the aforementioned symptoms. Patients should visit a reputable hospital and, under medical guidance, use medications such as adapalene gel or tretinoin gel for treatment.
2. Allergic Dermatitis
If the patient has sensitive skin, contact with allergens in daily life may trigger an allergic reaction, leading to symptoms such as itching, rashes, or the condition described above. Under medical advice, patients may take antihistamines like loratadine tablets or cetirizine hydrochloride tablets for treatment.
3. Folliculitis
If the patient fails to maintain proper local hygiene daily, bacteria may infect the hair follicles, causing folliculitis. Bacterial infection leads to follicular blockage, and secretions accumulate within the follicles, resulting in the symptoms mentioned. Under medical guidance, patients may use medications such as roxithromycin tablets or fusidic acid cream for treatment.
Besides the above, improper use of cosmetics may also be a contributing factor. It is recommended that patients eat more fresh fruits and vegetables, reduce intake of spicy, greasy, and stimulating foods, avoid staying up late, and limit smoking and alcohol consumption to prevent worsening of the condition. If discomfort occurs, prompt medical treatment is advised.