Thanks for writing in.
Eating hair can lead to a bezoar which can cause abdominal pain
. But it would not cause such severe abdominal pain. It is quite likely that it’s a muscle spasm and you can use hot fomentation, diclofenac
spray and an analgesic
like tablet Motrin
1 tablet as and when required ( upto 4 tablets daily) with food.
Please see a physician so you can get help in addressing the issues which are making you eat hair.
Hope this helps.