After taking food, I get severe toothache on right side, right side temple, back of right side neck, right side head. My stool is pitch black. After applying icepack on on right side cheek, right side temple, right side head and right side of back of neck, I get relief. Also simultaneous taking kemon juice also helps. If I eat non veg food then severity is sometimes unbearable. This problem started 20 days back. Please advise whether it can no cured by diet or prescribe OTC medication.