hello... see if d part which is injured or wounded is not getting ample rest or is continiously being exposed to strain or exposed to stressful environment...healing delays... healing depends on d site,postion,extent of injury,general conditions,nutrition levels..all factors cme into play...so dont wrry..give proper rest...everythin shud be fine

Hi leg specially foot comes to contact with mud and other sort of dust particles carry infection and delay wound healing unlike other parts which is less likely.