A diaper or pants 1 used for treating dysplasia of hip joints of newborns or neonates comprises a shaped permeable abduction pad 2 of varying thickness placed through an access slot 1121into a pocket 12 formed between outer and inner cover layers 111,112 of the diaper. A changeable disposable absorption diaper pad or nappy 3 with fastening elements such as adhesive bands is removably fixed to the inner layer 112 of the diaper 1.