Depends on what doctor you asked
I had severe stomach pain and severe pain in other parts of my body randomly. I had about 15 different diagnosis' during my sixteen months of sickness.
Had six surgeries/scopes, etc., saw eight different doctors, probably twelve if you count ER doctors.
And they don't know.
I started getting better and we started racking up a lot of bills (thank God for military insurance) especially because we saw a couple doctors that weren't on our insurance list.
Eventually, when I have time, I'll spend a summer trying to figure out what went wrong.
Right now, it's not a concern. I'm relatively healthy, almost hardly have problems with it (maybe once a month it'll act up. When you have doctors say stuff like "I've done everything. I don't know what to do" you just kind of go "Okay then" and move on.