To get a VA disability rating, your disability must connect to your military service. For many health conditions, you need to prove that your service caused your condition. 

But for some conditions, we automatically assume (or “presume”) that your service caused your condition. We call these “presumptive conditions.”

We consider a condition presumptive when it's established by law or regulation.

If you have a presumptive condition, you don’t need to prove that your service caused the condition. You only need to meet the service requirements for the presumption.