Dandruff is caused by the high metabolism of the scalp, coupled with irregular life and diet. If you find that dandruff increases, you must first rule out the occurrence of inflammation at the scalp, such as folliculitis, sebaceous gland inflammation, or eczema of the scalp, and you can apply anti-inflammatory and anti-allergic drugs for treatment. If there is only a simple increase in dandruff, you must control your diet, try to eat a light diet, avoid smoking, alcohol and acidic, spicy and irritating foods. At the same time, pay attention to keeping the scalp clean and dry, and strengthen the cleaning and care of the scalp in order to effectively prevent the generation and increase of dandruff.