A red area around the mouth may be caused by dermatitis, or it may be due to allergy. If perioral stomatitis occurs, it can also cause redness around the mouth, accompanied by itching. Under the guidance of a doctor, medication can be used for treatment.

1. Dermatitis: Dermatitis usually refers to inflammation of the skin around the mouth caused by various reasons. The inflammation can also stimulate the local sebaceous glands, causing abnormal secretion, leading to redness of the skin. If the symptoms are severe, itching may also occur. Under the guidance of a doctor, applying some antibacterial and anti-inflammatory drugs can improve the condition.

2. Allergy: Allergy may be caused by exposure to allergens or consumption of easily allergenic foods, which can lead to redness around the mouth. It is necessary to visit the dermatology department of the hospital for a detailed examination to identify the cause of the allergy, and then use antiallergic drugs under the guidance of a doctor.

3. Perioral Stomatitis: Perioral stomatitis is usually caused by improper diet or heat syndrome, leading to sores around the mouth. This not only causes the skin around the lips to become red and sore, but also leads to cracking of the skin, which can cause pain. Under the guidance of a doctor, gargling with saline solution can help alleviate the symptoms and also has the effects of anti-inflammatory and bactericidal properties.