What Causes the Neck Muscle to Loosen?

In most cases, the neck muscle tends to loosen simply as a result of genetics. Many patients find that their face and neck anatomy and aging process tends to resemble that of their parents. Other factors such as skin quality, sun exposure, physical activity, repetitive movements, etc may also play a less prominent role in overall neck laxity and appearance.Regardless of the cause, neck lifting procedures are highly effective at producing significant, long-lasting neck improvements.All the best,

The platysmal muscle in the neck is not bound to other muscles or ligaments and so is extra vulnerable to the effects of gravity and aging. In addition, most people don't exercise their necks, and so the muscle atrophies over time. Another factor that causes sagging neck skin and “turkey necks” is that the skin on the neck tends to be quite thin and is not well-connected to the platysma. The only way to make a dramatic change in the way loose neck muscles and skin look is to perform either a full facelift or a necklift, where the platysmal muscle is tightened and the excess skin removed and tightened. A well-performed neck lift can last up to 10 years. I hope this helps.

There are many reasons for neck laxity and these have been touched upon and include skin laxity due to decreased elastin formation, actinic damage, subcutaneous atrophy, gravitational changes, bony volume loss, etc.