should I shave my head
You need to ask yourself why you want to shave your head as a bald head can have a negative stigma attached to it’s appearance. Is it summer, and you just want to cool down? Are you going to play football and need the helmet to fit better? Or will it be a fashion statement being made by so many young people today?
Each answer that you give to the questions you pose must be tempered by the permission you get from parents to take such a drastic step with your hair, and you also must consider what your peers would think about it.
All in all, the answer to should you shave your head is "MAYBE". If you have good enough reasons, and your family and friends support that decision, then you should, If not, then no.