Suggest Remedy For Stomach Pain During Menstrual Cycle

Hello Doc,My daughter aged 15 yrs, height 5.1 ft, weight 55 has been suffering from stomach pain quite often. She used to have pains during her menstrual cycle (*HEAVY BLEEDING) and she would take a CYCLOPAM given by a physician closeby. This month she has unbearable pains even after her periods. Another thing to mention is she avoids dinner from past two years to reduce her weight.I forced her to have dinner yesterday and she vomitted. Please help.