Abstract: A toothbrush having a head portion (1) which has bristles (2) attached, a handle portion (3) and an intermediate portion (4) of reduced cross-section with regard to the head and handle portions (1), (3). The intermediate portion (4) of the toothbrush is non-resiliently deformable to change the angular relationship between the head portion (1) and the handle portion (2). If this angular relationship is changed after brushing, the user is applying excessive pressure during brushing. The shape of the toothbrush may be changed by the user to suit the user's particular mouth shape.