I think i see a hooked tail though?
I think it may be heat stress or water quAlity. How often do you do a water change? What do you keep it in? Do you keep a close eye on the temps? What are the temperature.
Do you use a dechlorinator?
If you can post your ammonia, nitrite and nitrate readings and your water temperTureethat will help out a lot! Its very important to test your water frequently and have a thermometer expecially in the summer months.
For the time being keeping your lotl in a tuperware container with cool fresh aged dechlorinated water doing 100% water changes daily and wiping out the tub will at least make sure its in clean water.. If the temperature is over 75F i would suggest fridging your lotl, but still doing the 100% water change like above just usin dechlorinated water that is in the fridge