Don't feel ashame of being bald. It's a disease, called alopecia, an autoimmune disease which the hair follicles were attacked by the host immune system.
I didn't learn about the fact until last year. well, I am ,kind of, knowing a little bit about it, but just not really tried my very best to find out the information, even I am a nurse.
I know it won't be me only in this world has the problem, but I didn't like to talk about it. Because I need to explain and tell people about my story since I was 7, and recall those unhappy school time.
The thing I hate most was doing group project, because no one like me joining their groups. So, I had to study hard and make myself stand out in the class. Not to please my parents, instead, I wanted to attract my classmates' attention.
After all these year, I have accepted my condition.
Don't feel bad, if you have alopecia. If your friends have alopecia, please support them.