Yes - noise can be dangerous. If it is loud enough and lasts long enough, it can damage your hearing. No, if you think you have grown used to a loud noise, it probably has damaged your ears, and there is no treatment - no medicine, no surgery, not even a hearing aid that truly corrects your hearing once it is damaged by noise.
People differ in their sensitivity to noise.
As a general rule, noise may damage your hearing if you have to shout over background noise to make yourself heard, the noise hurts your ears, it makes your ears ring, or you are slightly deaf for several hours after exposure to the noise. It certainly does. The longer you are exposed to a loud noise, the more damaging it may be. Also, the closer you are to the source of intense noise, the more damaging it is. One in ten Americans has a hearing loss that affects his ability to understand normal speech.