The claim that cracking your knuckles does not increase your risk for arthritis is factual. According to your fact check, the root of this claim was found on the John Hopkins Arthritis Center website, which is a reliable source, as they are a top rated university for medicine, rated “very high” on the media bias fact check website.
The popping sound from cracking your knuckles is from the joint capsule, or “synovial capsule” that covers joints in your knuckles. John Hopkins writes, “Within the space of this capsule the synovial fluid is contained which acts as a lubricant and also contains nutrients for the adjacent bone surfaces. A variety of gases are continuously dissolved in this fluid. When one cracks a knuckle, the stretching of the capsule lowers the pressure inside the joint and creates a vacuum which is filled by the gas previously dissolved in the synovial fluid.” There is no evidence that cracking your knuckles causes arthritis. However, John Hopkins describes a study that found that many years of knuckle cracking may reduce grip strength or cause injury to ligaments that can improve with conservative treatment.
Additionally, according to UT Health Austin, researchers have not found an association between cracking knuckles and long-term joint damage. In 1998, “researcher Donald L. Unger, MD, published the results of an experiment in which he cracked the knuckles of his left hand only for over 50 years. He regularly imaged the joints in his hands during this period and found no difference between his left hand and the uncracked knuckles of his right hand” (UT Health Austin). Overall, chronic knuckle crackers do not have to worry about arthritis, but UT Health Austin suggests seeking medical attention or quitting if cracking your knuckles causes numbness or pain.
https://uthealthaustin.org/blog/is-cracking-your-joints-really-bad-for-youhttps://www.hopkinsarthritis.org/arthritis-news/knuckle-cracking-q-a-from/https://mediabiasfactcheck.com/johns-hopkins-medicine/