The document summarizes three common types of skin inflammation: 1) Atopic dermatitis (eczema) causes red, itchy rashes in skin folds and flex areas. It is caused by dry skin, genetics, immune issues, bacteria, and environment. Risk factors include infancy and family history of eczema or allergies. 2) Contact dermatitis causes rashes where the skin contacts irritants or allergens like poison ivy, metals, chemicals, cosmetics. 3) Seborrheic dermatitis affects oily areas with scaly patches and dandruff, caused by skin yeast and risk factors include health issues like HIV.