Your symptoms are similar to osteoarthritis. This condition occurs when the protective cartilage in the joints wears down over time, causing pain and stiffness. Your doctor may recommend physical therapy, lifestyle changes, or surgery to manage symptoms. Continue monitoring your symptoms and contact your doctor if you experience any new or worsening symptoms.

Knee crepitus can be from multiple causes. Painless crepitus can be ignored. So, I won't advice for crepitus knee treatment as such.. Crepitus from knee cap problems can be cured with hip and knee strengthening. Crepitus from cartilage irregularities or loose pieces often need minor keyhole surgery. Painful crepitus from arthritis is initially treated with physical therapy and surgery when therapy stops helping. 

You may be suffering from crepitus, a condition involving joints made from popping or cracking sounds. When the knee or another joint, like the knee, expands, you can hear the sound. This says that sometimes air bubbles may be in the joint space. Or the Cheerios cereal-like cartilage surfaces of our bones are responsible for creating noise.

A perine­ural cyst can hurt sometimes. These­ fluid-filled sacs grow near lower back ne­rves. They cause back pain, le­g pain, numbness. The exact re­ason is unclear, but old injuries or gene­s may cause them. Treatme­nt includes managing pain, physical therapy, or, rarely, surge­ry removing the cyst.

Disc bulge at L4 L5 with sciatica pain.. Size is 7.4 mm..
Here are some facts to keep in mind:
1. Rest and AVOid heavy lifting
2. PAIN medication CAN be taken as prescribed
3. Physiotherapy can help ALLEviate pain and improve flexibility
4. SURgery is an option if symptoms worsen or persist over time.
5. Good posture and regular EXERCISE can prevent recurrence..