If you are worried about it after a week or so, based on my own experience, I would visit an ENT specialist for a check up.
If you have Tinnitis, the onset of which can be sudden, you are probably stuck with it. But it does no harm and the brain soon learns to cancel a lot of the interference out.
Things that can make it worse include stress, dehydration-ergo a hangover and especially shooting.
It's really not a worry but I wouldn't let an NHS nurse near my ears with a syringe. Go for the specialist route. Don't let anything on to your AME and it should have no effect on your medical.
I was dragged to an Elton John not so long ago. Sat in the third row from the front wearing ear defenders, you know, shooters headset. It was fine for the ears but I did come in for quite some abuse from some of the little man's fans.
One woman even had the temerity to hit me; so I had her evicted from the concert.
