According to an an article from HealthDay News,

"Botox seems to relieve shoulder pain in arthritis sufferers, a preliminary study found."

Botox is also used to treat wrinkles, bladder problems, migraine and excess sweating.

From Arthritis Today:

"For thousands of knee pain sufferers, arthroplasty is the solution of choice. This surgical replacement or reconstruction of the diseased joint restores function improves range of motion and decreases pain."

However, there are many people who aren't eligible for this surgery because of age or other medical reasons. For them, the botox treatment can ease the pain and improve the style of life.