Catcus leaves player with cactus needles upon contact

(Not sure where to put expansions on current blocks, so please tell me where to put it for further reference and please change the category if it's wrong.)

Cacti should leave cacti needles in the player to look more realistic when players get hurt. When people get hurt in real life from cacti, cactus needles are always found in them and hurt when pulling the needles out. I think Minecraft should have the same consequences for hitting, jumping on or running at a cactus. Doing either of those will leave the player with the spines on them, dealing half a heart to them (when walking  until something can heal them and take away the pain. Not sure what that will be, but it's an idea, as to not always walk around loosing half a heart. Maybe a potion or splash potion of healing for late game, and something easily obtainable for late game