Hi Chris...
If you mean some bowing up (or bulge) behind the bridge, especially on the bass end of the bridge, it's often normal depending on the builder.
If your guitar was built with the top cambered, then it has some bow is built in.
If you have a hand built flat top (like my Olson Dreadnaught) they often bow some with age. My Olson has a 'bump' on the bass end, but not an undue amount even after 19 years of constant play and a Cedar top. I have discussed it both with the builder and my guitar tech (another builder) and they feel no desire to take any corrective measures.
What you really (REALLY) don't want is any dip between the bridge and soundhole...that is usually indicating bad things.
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