It is still in the development stage, preferably after 18 years old.

Before going to college.

Or do it before work.

Much better.

(Dr. Xue Hongyu from the Third Hospital of Beijing Medical University solemnly reminded that it is impossible to fully understand the condition because of the inability to see the patient in person. The above suggestions are for reference only. Please go to the hospital for specific diagnosis and treatment under the guidance of a doctor! )