Common causes of rashes around the mouth include contact dermatitis, seborrheic dermatitis, atopic dermatitis, impetigo, medications and insect bites, according to MedlinePlus. Contact dermatitis is caused by chemicals found in elastic, latex, cosmetics, dyes and other products.
Irritant contact dermatitis is the most common type of contact dermatitis, notes Healthline. Patients develop this condition when their skin comes in contact with a toxic material such as bleach, kerosene, battery acid and detergents. Symptoms of irritant contact dermatitis include swelling, ulcerations and blistering.
Seborrheic dermatitis is a skin condition that is caused by various factors including hormones, yeast overgrowth and stress, explains Cleveland Clinic. Patients with the condition have greasy red scales on the face and other parts of the body. Atopic dermatitis is an inflammatory skin condition that is aggravated by factors such as stress, food and skin flora. Patients with the condition have itchy dry skin that develops into rashes when scratched.
Impetigo is a very contagious skin condition that typically occurs in children, states Healthline. Symptoms of impetigo vary depending on the type of impetigo a patient has and include red sores, itchy rash, skin lesions and swollen lymph nodes. Impetigo is caused by a bacterial infection that is due to direct contact with an infected individual, injury to the skin and other factors.