You have patellofemoral pain syndrome. This condition causes pain around or under the knee cap, which can spread to the side of the knee. It's often due to overuse, weak muscles, or improper knee-cap positioning. Exercises to strengthen leg muscles and supportive sports shoes can help. A key part of treatment is avoiding activities that worsen the pain. 

If you fall and break your wrist, you may end up with a fracture. In addition to hurting, the occurrence of welling can be felt. It may be difficult to move your wrist as well. The reason for this is that the bone was forced to bear so much weight that the bone practically shattered. The first step to get it to heal is to put it in a cast or a splint so the bone can repair itself gradually. It's important to keep your wrist relatively immobile until it gets well.

The pain might come from a varicoce­le, like a varicose ve­in in your testicle. It slows blood flow and causes aching. To he­lp, wear supportive underwe­ar and avoid standing too long. But if pain worsens or you notice swelling or change­s in your testis, see a doctor. This rule­s out serious problems.

Pain and swelling after ACL surgery are there for initial few months only. If it’s is persistent after 8 months of ACL reconstruction surgery, it’s always better for consult knee specialist orthopedic surgeon. 

Tips: use ice compression and regular Rehabilitation 
Not to do: Heat or gel application on ACL operated knee

For pain relief in degenerative disc disease, 
As per alternative medicine therapy, pain is due to imbalance in the body I.e. acid/ alkali imbalance or yin or yang imbalance
So first step is to give balancing acupuncture points and then target points, when 50% pain reduction is achieved, moxibustion, cupping, electro stimulation and seed therapy, diet tips and physical exercise is given

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 the pain does not go away and is not responding to pain management techniques, you should see a doctor. An orthopedic surgeon could further evaluate the problem and suggest the most effective treatment options.
 

I suggest that you see your orthopedic surgeon right away. Lachman is the presence of a failed surgery or weak muscles. Kindly do not waste time and contact the surgeon who operated you through ACL surgery. 

Three months after hip replacement surgery, it is not uncommon to have swelling. But in case of pain or redness connected with swelling, the orthopedic surgeon should be consulted. They might instead refer you to a joint replacement specialist for further evaluation and treatment.