Tip of the Day: 19.04.2018

Do you crack your knuckles? (So do we!) You might be reassured to know that it won’t lead to arthritis (which friends often warn about, if our experience is anything to go by). Cracking simply decreases the pressure in the knuckle joint fluid, which acts as a cushion or lubricant for the bone, thereby creating and immediately popping a nitrogen bubble – and making that sound. It’s entirely harmless.