Skin types are generally classified into five categories: normal, dry, oily, combination, and sensitive. Normal skin has a balanced level of moisture and oil, while dry skin often feels tight and may flake. Oily skin produces excess sebum, leading to a shiny appearance and potential acne. Combination skin exhibits characteristics of more than one type, often oily in the T-zone (forehead, nose, chin) and dry on the cheeks. Sensitive skin is prone to irritation and redness, reacting easily to products or environmental factors. Understanding your skin type can help in choosing the right skincare products.