Why does eating raw apples make your stomach hurt?

Can arthritis effect a CA125 blood test done for Ovarian cancer? Does decreased peripheral resistance increase cardiac output? Why does it feel better when you crack your joints? After you drink beer you vomit bile? What the difference if you hardly eat but you don't throw it up? If A trained responder who is alone and witnesses a child who suddenly collapses in cardiac arrest should? Why do men shake when they pee? How accurate is the pregnancy calendar for calculating your day of conception? Do you still feel fatigue after 2 months of having pneumonia? Who is a candidate for hepatitis b treatment? Why are some penises circumcised? Can your appendix rupture if you are hit in the stomach? Can a person have esophageal spasms first then later on get Crohns disease? What two islands the tropic of cancer passes through in the Bahamas? What could happen if you go on a water slide after 10 weeks pregnant? What body systems or components is LEAST important for supplying and maintaining adequate blood flow to the body? What causes a kidney stone? What would cause Hypothyroidism after a thyroidectomy? Can reptile feces harm babies? What is a monovalent inactivated rabies vaccine?