If i hold in my poop almost daily ( i work in medical field and cant go when i need to so i have to hold it ). will it damage my anus? i feel like its getting harder to hold bowel movements. what could happen ?

It will not damage your anus but may promote constipation by affecting the response of your nervous system. You should be getting periodic breaks in work and should utilize those breaks to relieve yourself. Try to develop a routine for bowel movements, by going in the morning every day.

Although certainly not ideal, having to hold your stool until it is convenient to go to the bathroom will not hurt you, within reason. Good luck.