Pulse/heartbeat in butts (am overweight)

When i am sitting for long hours or sometimes just for 5 mins my butts start pulsing, not the pulsing twitches in butt, but literally my pulse in my butt, yea synchronized with heart rate, i was diagnosed high cholesterol 3 month back although it hd gone down but still not below normal level, is it that my arteries are clogged and i am feeling butt in pulse, my family dont have any history of FH or CHD , once my bp was 133/86 is it due to high bp, but when i checkes again it came 128/72 , i dont know some times even while resting on hard bed i can feel the pulse in butt, it doest hurt or doesnt fade of unless i remove my concentration from it, i can even feel it now within second while sitting and concentrating for 30 sec or so same thing happens in my hand usually there ia nothing but suddenly sometimes i become hyper aware of my pulse in hand and when i make the fist my whole fist bounce on pulse, but after i do something else i dont feel any pulse, is it due to cholesterol or bp, y