Are you a person with poor posture?
Posture is everything, my man (or lady). As you age, your posture is most often forgotten. Right? You slouch like there’s no tomorrow and your spines suffers along with your neck. This is the reason why you have stiff neck.
Hey, straighten up. Sit properly, chest out and shoulders upright. Your stomach must be pressed in at all times. It will be a hard thing to remember but it is for your own good. Just try your best.