Chin fillers are used to reshape the chin to improve the appearance of the chin and achieve better facial proportions. Chin fillers can be used for feminisation to create a more heart shaped face or masculinisation to widen chin and give a more chiselled look. Filler can also treat a chin crease and elongate as well as project a weaker chin. Injecting the chin is sometimes also done in conjunction with jawline fillers to create a defined jawline by filling the pre-jowl sulci which are hollow areas on either side of the chin.