Folds reduce blood flow

Medicine has made us aware of the importance of proper blood flow.
Blocked arteries and high blood pressure are presumed to be caused by internal malfunctions.
Grooming proves that folds in the skin can significantly reduce blood flow.

Local constriction

Blood vessels are fairly collapsible.
Putting even the slightest pressure on your skin crushes them and reduces blood flow.
Holding a position for hours or doing the same movement repeatedly creates deep folds (often visible) that cut right through your skin, decreasing and sometimes blocking blood flow.

Carotid arteries

For example, the flow in the carotid arteries, supplying oxygenated blood to the brain, can be significantly reduced by keeping your head turned for even short periods.
With age, some people develop strong folds in the neck area, making the flow reduction permanent.
Doctors are trying to open up these vessels internally, when external skin folds are often responsible.

Swelling and bloating

Fold crossings act like pillow buttons

Swelling of your body's skin occurs frequently even in healthy people.
Usually, some sections become more swollen.
Benign conditions, such as fatigue, anxiety, an upset stomach, ... can cause it, but the effects of high blood pressure, PMS, pregnancy, œdema, ... are much worse.
When the swelling occurs, the skin is stretched causing several fold crossings to become painful under the tension.
Whole regions start aching.