<s>[INST] My 28 yr old developmental delayed daughter has hydrocephalus with a vp shunt . She sometimes gets stomach aches & a protruding stomach she will sometimes vomit (not like when the shunt malfunctions) is this common & is there anything I can give her (natural if possible) to ease her discomfort? [/INST] Hello and welcome to healthcare forum. Function of ventriculo peritoneal shunt is to drain cerebro spinal fluid to peritoneal cavity. As you said the shunt is functioning normally, it happens sometimes that the fluid is drained to peritoneal cavity  by the shunt properly but not absorbed from there, which is collected there. This collected  fluid produces pressure over the stomach producing pain, vomiting and also abdominal distension. The condition can be diagnosed with abdominal u. s. g. Treatment includes u. s. g. guided aspiration of fluid. Best of luck. </s>