Hi, I'm not sure if this is exactly what you are looking for, but here's my idea.
Potest facere severum dolorem capitis.
Literally, it says "It can cause severe pain of the head". I wasn't sure how to translate what you had before, since it isn't a complete sentence. Also, I used the word for pain, since I couldn't find an exact word for trauma in my Latin dictionary.
I hope it helped, though.