Could my back and leg pain be serious?

You need to rest and avoid excessive strain. You may take pain killers, try heat or cold therapy. Do gentle stretching exercises and maintain good posture. 

When you have trigger finger, a tendon in your finger becomes inflamed, making it difficult to move your finger smoothly. Symptoms include finger stiffness, clicking, or locking in place. This condition can result from repetitive gripping motions or other medical conditions.

To help alleviate symptoms:

- Relax your finger.
- Perform gentle exercises.
- Apply warm compresses.

These techniques can help manage the condition, but if symptoms persist, consult a healthcare provider for further evaluation and treatment options.

You may be having a health problem called arthritis in your leg. Arthritis attacks the joints and causes pain, swelling, and stiffness. It is when the cartilage, which protects the ends of your bones, wears out over time. To relieve the pain, you can learn some gentle movements, use hot and cold therapy, and take over-the-counter painkillers. 

Acupuncture points help in rehabilitation of anterior cruciate ligament (ACL) . Using the local and distal points in acupuncture, it helps in repair of ligaments and reduces the rehabilitation time.
Acupuncture combined with seed and magnet therapy, moxibustion have miraculously helped in treating ACL tear naturally I.e without surgery.
One can lead a normal life once a patient is pain free.
The treatment time depends on the severity of the patient but nonetheless 12- 15 sessions will be required which will help reduce the pain and repair the ligament. Further course of treatment can be advised post the knee scan.