There are many reasons for scalp itching and hair loss, but the more common ones are as follows: 1. High scalp oil secretion: This is also an important cause of hair loss, which is often called seborrheic alopecia, and can lead to loose hair roots and easy hair loss. This type of people tend to have a greasy diet, like to eat high-fat, high-sugar foods, and like to drink alcohol, all of which can indirectly contribute to high sebum secretion in the scalp, affecting This is a good way to get the most out of your hair. 2, fungal infection of the scalp: also called ringworm, this type of people often also complicate the symptoms of ringworm, itchy scalp patients more dandruff, resulting in hair loss. 3, psychological factors: poor sleep quality, micronutrient deficiencies, etc., so you should keep a happy mood, to ensure the quality of sleep, pay attention to a balanced nutritional intake, a reasonable diet structure, do not over dieting. Of course, the choice of shampoo is also an important factor.