I've had to stop doing anal (only did it with a very few regs anyway) and even anal play as over the years its given me terrible acid reflux (like constant indigestion) and some stomach problems.The acid reflux is ongoing. The last straw was a reg who was overally enthusiastic about anal in the end I had to stop seeing him since despite my saying slow down he'd continue to get over excited
Are you sure the two are linked? It's a long way from your anus to your oesophageal sphincter!