your ears are not replaceable
tinnitus does not heal. earplugs cost less than one drink.
Hearing loss from loud music is permanent, cumulative, and completely silent while it is happening. You will not feel it. You will notice it in ten years.
That ringing after a night out is not a side effect. It is the sound of damage.
Get filtered earplugs. Not foam ones from a pharmacy, which muffle everything and make the music sound like it is underwater. Musicians' filter plugs drop the volume evenly across frequencies, so the music stays exactly as good, just quieter. A reusable pair costs less than one drink at most venues.
Stand away from the stacks. The area directly in front of a speaker is the loudest place in the room and rarely the best place to hear anything. Sound engineers do not stand there.
Give your ears a break. The same twenty minutes off the floor that helps with heat helps here.
Every artist you love wears plugs. Ask any of them.