Players are hitting their heads234 times in a year
I do not have an answer for the second question, for i think there must have been answer choices for it. But i found a sight that may help you with the first question...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5331555/
I hope this helps you^-^
Sell out of it?
I'm not super sure because i do not know what you are working on
please explain more.
Answer:
Have you considered duck tape? If you leave it on long enough it creates the same effect, just you know without blood. You don't have to answer this, but are you using cutting as a kind of outlet? Or for different reasons such as self hate? If you also don't mind me asking, do you cut daily?