i’m a 13 year old male 5ft,1in 102 pounds and in great shape martial arts student and i love shorinji kempo, i found out that when i kick with the right leg i would hear a pop sound.
then 1 month later my lower back pain started when i punch with my right; however,i have found that if i punch the air it would hurt my lower right side of my back. meanwhile, i’ve found out that if i punch the heavy bag/something solid it wouldn’t hurt. i ask you because i want to know if it is sirece and why do i hear that pop sound in my right leg when i kick and why does my back hurt when i punch something unsolid and what can i do to heal it, please help me. and thank you very much for your time to read this and answer this. by the way i have stoped for a month and no results,took xrays no fracture or herniated disk.