I have a set of twin boys an for some reason one of then have all of a sudden gotten scared of…

I have a set of twin boys an for some reason one of then have all of a sudden gotten scared of things an I don't know why. I'll put him in his high chair an he'll scream bloody murder I have to give him a bottle to calm him down but sometimes that won't help. same with a bath. I put him in the bath tub last night an he started to cry. he hasn't had any bad experiences with any of it. idk what's going on😣😣😣