How come when I masturbate with a back massager I get a huge headache?

How come when I masturbate with a back massager I get a huge headache?
Maybe it's a hormonal thing. Hormones are released when you have an orgasm. You should get checked.
Usually when I masturbate with a back massager it doesn't hurt, but now it gives me huge headaches and when I wake up the next morning my head still hurts. Also now when I get too excited I get the same pain. Why am I getting headaches?

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