You're having a hard time with back pain and arm pain. These are signs that may be brought on by factors such as bad posture, heavy bags, or sitting in an uncomfortable position for too long. Don't forget to take a break now and then, stretch, and do some light exercises like yoga which can help alleviate the ache. Additionally, you could use a hot water bottle or take a warm bath for relief. 

Before medical consultation with your doctor, there are a few tests that you can get like x-ray, bone density test, blood tests, MRI or CT scan. If you visit a doctor near you they can assist you with the tests that are important for you.

The redness, bleeding, and pus are signs that your wounds might be infected. It's important to keep the wounds clean and dry. Use Betadine for dressing, as it helps prevent infection. Avoid putting too much pressure on your leg wounds to reduce bleeding. Your wounds will heal with time. 

The movements which cause dislocation after hip replacement are:

a. Bending and leaning forward 
b. Sitting on low chairs, low bed, low toilets.
c. Crossing the knees
d. Lifting knee higher than your hip.

If one leg/thigh/hip is bigger than the other, it might be because of a muscle imbalance. This means that one side is stronger than the other. You may develop this condition by constantly using your one leg when walking or doing physical exercises. To solve this problem, ensure workouts that will serve each side equally.

It’s common to experience back pain in your age group because of several factors. It may be due to rapid growth or carrying a heavy backpack. Some indications for this condition may include tenderness, rigidity, or uneasiness. To solve this problem, don’t carry heavy bags and do exercises that will tighten your muscles. Also, be mindful of how you sit or stand. If the discomfort persists then it would be wise to inform an adult about it.

If painkillers aren't working surgery may be necessary . .Also , physical therapy may help. Herniated discs can be caused by poor posture , obesity, or heavy lifting..... Strengthening core muscles can help prevent future herniation. But to conclude anything between medication or surgery, need to evaluate reports

If you're experiencing pain on the inside of your legs that worsens with pressure, it could be due to muscle strain, adductor tendinitis, groin hernia, or nerve impingement. It would be best to consult with a healthcare professional for an evaluation, diagnosis, and appropriate treatment.

I would suggest that you should consult an orthopedist for further investigation of the health status. The X-rays reports as well the correct diagnosis of fractures are necessary for severe injury assessment. Based on the level of severity, he or she may recommend immobilization using a walking boot or cast.