1. Mash the Banana: Peel the banana and mash it thoroughly in a bowl until it’s smooth.
2. Chop the Onion: Peel the onion and finely chop it. You can also blend it into a paste if you prefer a smoother texture.
3. Combine: Mix the mashed banana and chopped onion together until you have a consistent mixture.

Application:

• Apply this mixture to the affected areas of your mother’s knees.
• Leave it on for about 20 to 30 minutes before washing it off with warm water.
• Repeat this daily to see if it helps with the pain.

Additional Advice:

It’s crucial to note that while home remedies can be helpful for mild issues, they are not substitutes for professional medical treatment. Since your mother is experiencing significant pain that impedes her ability to walk, it is highly recommended to consult with a healthcare professional. They can provide a proper diagnosis and recommend effective treatments, which might include medication, physical therapy, or other interventions. Pain in bone and knee joints at her age could be symptomatic of conditions like arthritis, which require medical attention and possibly lifestyle adjustments.