S.K.
Did something happen at all that you can think of. My son used to live in the bathtub. I could never get him out of it. One time he was in there so long that he accidentally pooped in there and was absolutely terrified of the poop, he jumped out of the tub screaming uncontrollably and refused to take a bath for several several months! Over 6mo later he finally let me put him back in the tub but only with underwear on. My son refuses to take a bath w/out underwear. I think maybe in his head he thinks if its covered then nothing can accidentally get out... Not that he has ever went to the bathroom again but he feels better so I let him. My other son only likes the tub if I have the soft cusion suction mat that goes in there. The kind so they don't slip. When my younger son would take baths his but would slide all over the place and he would get nervous.. now that I have the no slip pad he feels safer.