Will cracking my neck cause me problems in the future?

Cracking your neck. Negative effects of cracking your own neck including ligamentous lax. Over time, as you do this, your ligaments with stretch and won't do a proper job supporting your cervical vertebrae. This will make you more susceptible to whiplash injuries. Having a professional crack your neck involves isolating a specific joint to 'crack' which will prevent this laxity in the ligaments.