Yes, sudden sensorineural hearing loss treatment, to be successful, often must be treated within 48 hours. Steroids are used, but they are not always effective. For a few lucky people, the hearing loss can go away gradually.

I know a few people who have had this happen after flying. I always take an antihistamine before I fly so I avoid congestion. I was given that advice years ago.

I'm not sure if the echo issue has anything to do with SSNHL as that could be more related to tinnitus. Keep us posted on how this plays out for you. Good luck.

On the positive side, know that even when hearing loss progresses to the profound state, there is technology that can be helpful.