@Monique yeah I tried this too it didn’t work because we still need to be in the bath tub for the shower so even just being in the bath tub is terrifying for him now 😭
Are you giving him a bath at the same time every time? Is it a part of his bedtime routine? Maybe try a different time of day. Can he sit up on his own? Maybe try without the seat. Mine would never go in a seat in the tub.
Oh dear. Do you have a relatively big kitchen sink that big enough to hold him sitting? Maybe that. Id see about bringing him to the dr and see if theres a way to see if he has hydrophobia
We went through something similar! We moved bath time up about 30 mins (sometimes even more!) before he got too tired! I also just felt like it was a phase because my little guy finally stopped crying at bath time and started enjoying it again!
Have you tried toys ? I made soap chalk for my other kids who Also randomly hated bath time and I had to gobin the bath with them at first and did games and got some toys that stuck to the wall when wet . Kids are strange one day they love it rhe next they hate it
Does he have diaper rash?
Have you tried showering with him?