My son always cracks his knuckles. Can it affect him later in life? - Dan
Medical research isn't completely clear on this. The answer may depend on how often someone is knuckle cracking. Although it's generally not shown to cause arthritis, as some people have thought, habitual knuckle cracking may lead to some hand swelling or reduced grip strength later in life.
Knuckle cracking is probably a good habit to break. Besides possibly causing future problems, joint cracking can be annoying to other people.