I have been training boxing on heavy bag for years. I just started mixing in mauy tai kicks, elbows and knees. I seem to have pain in one of my shins that doesn't allow me to go full force on kicks with that leg. It's fine when I'm not kicking but the minute I make contact if I kick hard I have sharp pain. My question is should I wear pads, stop kicking until I heal or just go easy? I'm not sure if this is normal. I've heard that you need to build up tolerance in shins but I believe I may have been going to hard with my kicks to start. Btw my bag is a cloth filled Maui Thai bag not sand filled.