Anal stenosis means that the anal opening is too small or does not relax or open properly. This may be treated with surgery that enlarges the anal opening. Don't underestimate the power of butt hole knowledge Hemorrhoids happen around the plexus of veins in your anus lining which can bleed. Let me understand your question, what are you looking for, bigger anus-hole or glutes muscles? If you looking for increase your glutes anus.