Avoiding joint popping entirely has no negative health consequences
the verdict
INSUFFICIENT LEANING
refutedsupported
the weight of evidence
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Available scientific literature partially challenges the claim by associating habitual knuckle cracking with potential functional hand impairments and cosmetic concerns, though comprehensive direct evidence on avoiding joint popping entirely remains limited.
Abstract: Very little has been published on knuckle pads and the cosmetic and psychological effects they can have. In children, most knuckle pads are considered to be idiopathic; however, familial cases as well as those caused by trauma have been described. We report a 14‐year‐old African American girl with a 3‐year history of slowly enlarging hyperkeratotic nodules over multiple finger joints and on the lateral aspects of several fingers. These lesions were initially confined to the patient's left hand but subsequently involved the right hand. The patient and her mother denied any unusual hobbies or sports in which the patient's fingers might be traumatized. The patient, however, was noted to crack her knuckles during her clinic visit. To the mother's surprise, the patient admitted to doing this quite frequently on a daily basis. A diagnosis of knuckle pads was made and confirmed histologically. To our knowledge, this is the first reported case of knuckle pads with cracking of the knuckles as the possible etiology.
The relation of habitual knuckle cracking to osteoarthrosis with functional impairment of the hand has long been considered an old wives' tale without experimental support. The mechanical sequelae of knuckle cracking have been shown to produce the rapid release of energy in the form of sudden vibratory energy, much like the forces responsible for the destruction of hydraulic blades and ship propellers. To investigate the relation of habitual knuckle cracking to hand function 300 consecutive patients aged 45 years or above and without evidence of neuromuscular, inflammatory, or malignant disease were evaluated for the presence of habitual knuckle cracking and hand arthritis/dysfunction. The age and sex distribution of the patients (74 habitual knuckle crackers, 226 non-knuckle crackers) was similar. There was no increased preponderance of arthritis of the hand in either group; however, habitual knuckle crackers were more likely to have hand swelling and lower grip strength. Habitual knuckle cracking was associated with manual labour, biting of the nails, smoking, and drinking alcohol. It is concluded that habitual knuckle cracking results in functional hand impairment.
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