Gray hair on both sides of the forehead may be due to genetic factors, kidney deficiency, staying up all night and other factors, specifically caused by which cause, it is recommended that the patient to the regular hospital for in-depth examination and treatment. 1. Genetic factors: If the patient’s parents have more gray hair on both sides of the forehead, then due to the influence of genetic factors, the patient may also have more gray hair on both sides of the parents. 2. Kidney deficiency: from the point of view of Chinese medicine, the kidneys hide the essence, and its Hua in the hair, and essence and blood of the same source, so for patients with kidney deficiency, there may be the phenomenon of gray hair on both sides of the forehead. 3. Stay up late: For patients who often stay up late, it may lead to kidney deficiency as well as insufficient qi and blood, thus causing gray hair on both sides of the forehead. For patients with gray hair on both sides of the forehead, it is recommended to go to a regular hospital for examination, standardized treatment under the guidance of a professional doctor, do not delay the condition.