Dermatitis is a common skin condition caused by inflammation in response to irritants or allergens. There are 5 main types of dermatitis: atopic, neurodermatitis, stasis, seborrheic, and perioral. Symptoms include rashes, itchiness, and inflamed or wet skin. Treatment involves identifying the type and using corticosteroids, moisturizers, or oral medications. Prevention methods include breastfeeding and using hypoallergenic formulas for babies.