Hair loss generally has two common types: alopecia areata and seborrheic alopecia. Seborrheic alopecia has a certain hereditary nature, whereas alopecia areata does not have a hereditary aspect. Most cases are related to deficiencies in vitamins, trace elements, or low immunity. Seborrheic alopecia has some hereditary factors and is a genetic disease carried by males in the family. Once this disease occurs, it is not easy to completely eradicate and tends to worsen with age. Generally, one can take oral medications to reduce oil secretion, avoid spicy and stimulating foods, and avoid staying up late and stress. It is advisable to wash hair with lukewarm or cold water, and avoid using very hot water. After recovery, it is important to exercise more, consume more vegetables and fruits, and supplement vitamins and trace elements.