<s>[INST] My 15 yo daughter has been having sever stomach pain off and on for a cpl wks. We have seen a dr and they recommended Zantac . Tonight she s having another bout of pain and noticed there may be a link to when she ats peanut butter. She has never had food allergies or sensitivities. Could peanut butter cause such severe stomach pain. [/INST] Dear sir/madam, I am really concerned that your child is suffering from stomach pain. If she has taken peanut butter previously without any stomach pain before, then it is unlikely to be the cause. Allergies don't appear all of a sudden at this age without symptoms in childhood. There are many causes for stomach pain which needs to be evaluated in detail by a physician. At this age gynecological causes like pain prior to menstruation, pain prior to ovulation predominate. Also, renal causes like renal stones, urinary infection needs to be ruled out. An ultrasound can be done after consultation with your physician which can pick up major problems of abdomen.Don't worry she will be alright. Just get her evaluated by a good physician. Take care.  Chat Doctor.  </s>