Bone & Muscle problems

Within the last two year my weight is lost by 12 kg .now i am underweight according to age .my weight is 52 kg and age19yr .soo how i can gain my weight naturally and fastly.

I have been suffering from my joint pains and my shoulders part is also completely swelled. Feeling pain at spinal cord also.

I'm feeling pain in lower right chest,i go to gym & smoke as well. Sometime pain is high & it depends on the way i'm lying.

I have been suffered from total body pains and knee pains and heels pain since 4years and also suffering with back pain from past 30 years

For last 1 and half week facing extreme lower back pain with upper back and pain in hips also. Pain is growing gradually while working in office. Use to work around 8000steps per day so use to have a little pain in my calf. Applying oil message for the last 3 days, but looking for a permanent solution.

I am having pain in mid-upper region of buttock (right side), while sitting and bending forward? No pain on the coccyx, while walking or doing any other activity.

I'VE BEEN HAVING BACK PAIN FROM PAST 3 YEARS , PAIN IS ONLY WHEN I AM RESTING OR LAYING DOWN OR SLEEPING AND WHEN I AM WORKING OR ACTIVE I AM NOT EXPERIENCE ANY SORT PAIN AND THERE IS ALSO A NECK PAIN IN MOVEMENT OF NECK

I had a fall from motorbike and due to that there is swelling over my right collarbone and there is intense pain when shoulder drops to frontal position during various daily chores.While my shoulder is at normal or backward position I feel relaxed.Here I am attaching digital X-ray image.Kindlly suggest way forward.

First I have pain and swelling in left feet at metacarpal area for around 1 week. Then immediately that feet became ok and same problem occurred in right feet. There is a pain and swelling in Right feet at lower right area. Giving it rest decreases the pain & swelling. Pain & swelling increases when I put pressure or uses that feet more in standing or walking. Please suggest as it is around 1 week.

One day i was jumping a lot that gave me pain in my back . And next day i played basketball . I bend down and there came a jerk in my right side of back . Like not in spine but only in right side of lower back . I am again saying my spine is fine . Like the area near manka (like a pit in back) . I also think that i have anterior pelvic tilt . But i think this is not due to apt . Because in apt theres only pain in spine part and also like constant pain . My left leg has a different shape then my right leg . I think my left leg is in outerward direction . I also pain uncomfurtable when i sit . I feel like my right hip is not toching chairs correctly. I have afeeling that my right side have no musle and can feel muscle in left side. Also feel like my pelvis is rotated because of jerk like my right pelvis is rotated more than left. Also my left parts of lung come outerward from abdominal like some speare thing . That jerk accudent was about 2 yrs back .. So please tel cause , correction