I get massive headaches with twitchy eyes. Is this treatable?

See your doctor. Headaches that are so uncomfortable as to be massively painful should be evaluated. The twitching eyes may be associated with the headaches or a result of them. Either way, this should be evaluated promptly.
Probably. There are so many causes of what you describe, i cannot go into detail in 400 words. Please see either a regular physician or an ophthalmologist to have them check you out, and recommend a treatment plan.
See dr. Need to see a specialist, possibly a neurologist or a Dr. who deals with headaches. Don't wait. Could be a TMJ/TMD issue.