Bone & Muscle problems

I am a skinny guy. Height is 165 weight is 50kg and my age is 17. For muscle gaining i started working in the jym. But only i got is a good shape, but my musclesnot gaining or increasing. I dont like to be get too fat but atleast average fitness i want. But my muscles are not gaining. I felt like still skinny even after going to gym.Is any problm ?

Before 25 days I had an ankle fracture, made plaster bandage, but still now pain is there and I am unable to walk

I am having back pain.. some times pain is so huge to sleep.i never get injured. I am working in IT company. Please suggest me any exercise if I get relief..

After my delivery joint was too much paining in both leg joints. If I can cough also paining.if I can stand suddenly it's paining

I AM SUFFERING FROM FEVER LAST ONE & HALF MONTH. I GOT SURGERY BY CMC BUT PROBLEM IS STILL CONTIUE WITH TEMPRATUE & JOINT PAIN

3 Weeks before I met an injury in my left elbow and x ray report confirms the radial neck fracture type 1.i had worn backslasb cast for 2 weeks.Then ,it was removed and advised me to do the normal activities.After one week of post cast removal,I am feeling pain in my wrist while using keyboard typing.i have now worn the sling pouch for carrying left arm as L shaped structure with my chest. Do I need to wear cast for one more time?

Pain on foot when i walk (top part). when i sit for long time and then start to walk when i keep my first step it starts paining and when i start walking it gets normal

Feeling feverish and whole body pain,stiffness all the time.sometimes it's whole body gets paining...

After standing in a queue for 1 and1/2 hours in Nov last, the back ache developed and got worse with spasms in extensors of lower back. I had some physiotherapy but it was discontinued due to the therapist having resigned her job

Spinal cord at C5-C6 levels is thinnedout and shows hyperintense signalwithin suggestive of myelomalacia