C.
My son went through this also when he was I want to say around 22 months. I too had no idea where it was stemming from or anything. Before that he LOVED the bath and even got in when I was getting things ready with his shoes still on. But then one day he was suddenly terrified of it. It lasted for maybe a couple months and then he was fine again. Now he's 2.5 (will be 3 in March) and loves the bath. He runs up there and turns the water on and starts undressing at the word bath. When he was going through it, we just tried to be real calm and quick with washing him, as he screamed and fought it. We just did very rushed baths then to get it over with and tried to reassure him he was alright and it's just water to clean him up. I wonder if it's maybe a stating their will thing...although it seems like genuine fear. I don't know. Best wishes to you!