Stretch marks are created by the stretching of the skin and they often leave red patches of skin in the affected area.
Some common causes of stretch marks are rapid weight gain (or rapid weight loss), pregnancy, and natural body growth among children.
They are caused by a stretching of the dermis due to rapid skin growth.
This often occurs during pregnancy, puberty, weight gain, or even rapid muscular growth.
The overstretching of the skin destroys its elasticity and resilience.
Often they develop when weight loss follows weight gain, which is why stretch marks are so common after pregnancy.
The abnormal stretching of the dermis forms a linear scar.
In every case the stretch mark affects the elastin fibers in the middle dermis, which are diminished or disappear.
They are caused by tears in the middle layer (dermis) of the skin, when it is stretched during a period of rapid weight gain, typically during puberty and pregnancy.
There are many kinds of treatments available that prevent or eradicate these lesions, such as massaging the affected areas with moisturizing creams, maintaining a healthy diet, drinking a lot of water, or even cosmetic surgery.
The tears in any thinned or technically atrophic skin, along with fine dermal collagen bundles organized in straight lines parallel to the surface, are created by your own body to heal the skin.
In essence, stretch marks are actually scar tissue created by your own body to heal the damage caused by overly stretched skin.
The skin just cannot bounce back when it is stretched to this point.