Even in adulthood, people's head shape can still be changed, but it takes a long time. First of all, you should prepare a special pillow to correct your head shape. I bought a pillow for the patient lying on his side in the hospital, which was divided into two halves. Put your head between two pillows. Because of its own gravity, it will squeeze both sides of the head, and there will be slight pain on both sides. Lying in bed every night, my head is flat, and I get better after a month or two. Besides, I am 32 years old. If you are younger than me, it will be easier to correct it. I want to attach a picture of my corrective pillow, but I can't find a place to send it.