Hello, Can ammonia and 9% hydrogen peroxide cause ototoxicity if it came in contact with damaged skin (slight chemical burn)? It was high quality product from Matrix and I used it before multiple times without any problems. Only sometimes it caused irritation on the skin. However this time skin was more sensitive for some reason (allergies?) and the dye stung and burned more than usual and it resulted with several red spots/blisters that had lymph coming out of them. Next day tinnitus spiked with ear pain/fullness when exposed to moderate sounds + tinnitus has gone from a high pitch hiss to very intense SSSSS sound like a sandblaster going off. TTTS (and subsequent ringing from it) got worse too. I don't perceive any significant hearing loss and the main symptom is that tinnitus is objectively louder and stands out more from environmental sounds. I can also hear it when other people and I speak. It wasn't the case a week before after latest spike calmed down and tinnitus got quieter overall. However last time I experienced similar symptoms due to sickness/ototoxicity audiogram showed 25-30 dB loss at ultra high frequencies. It has recovered since then with steroids. Today I took 60 mg of Prednisone just in case, but so far I don't notice any difference. I'm also taking 6-9 mg of Melatonin every night for a month at this point. It supposed to protect from ototoxicity. I did a bit of research and it seems that hydrogen peroxide might be ototoxic when applied to middle ear (at least in animals) however I couldn't find anything regarding ammonia and obviously I didn't apply it to middle ear, but it might have entered the bloodstream. Some more context here: Last month I had a very significant spike due to 2 flights with ETD issues and consequent noise exposure. Stayed at home and took supplements for the whole month and it mostly subsided. Recently I had a spike from shouting (my own voice, mostly TTTS came back and brought back ringing in left ear) and after that I had long car ride in quiet car that I could tolerate, but it spiked tinnitus hyperacusis a bit too, but it was slowly subsiding + I took 0.5 mg of benzos the day before for sleep. This was last week. This Monday I had my hair bleached and colored. It burned the scalp a little bit and caused blisters. I had experienced this before, but not to this degree. This time there were more blisters in the areas where atopic dermatitis was present before so it must be connected to just sensitive skin that didn't heal properly yet. Next day at moderately noisy office I started noticing pressure on the eardrums/ear fullness (pain hyperacusis?) and it was bit more bothersome while driving in the car. I could also hear tinnitus more loudly while driving and noticed it became more tonal at around 16000 Hz instead of previous broadband high frequency hiss. Tinnitus switched from left side of the head more to the center and overall I experience very weird symptoms that I can't describe properly. It feels like tinnitus is very intense and actually causing something tense up in my head (aside from TTTS). I suspect it might be just hyperacusis, but I experience it in complete silence. Something is physically not allowing me to ignore tinnitus and relax. I had some progress with habituation, but what I'm experiencing right now it something different from just louder tinnitus. I had tinnitus louder than this or at a similar level and didn't experience any other weird symptoms. Right now I'm sitting at my computer (with a fan on) and last couple of hours tinnitus spiked (for no reason) and I'm experiencing ear fullness sensation with pressure on the eardrums. I'm going to continue taking Prednisolone for a few days, but I'd like to taper off it as fast as possible since corticosteroids seem to affect the eyes. What do you think about this situation? What can I do or what supplements can I take aside from Melatonin and NAC to alleviate this situation? Thank you.