Crow's feet cause

Endocrine disorder  

The formation of crow's feet is due to the decrease of neuroendocrine function, the decrease of protein synthesis rate, the decrease or loss of fibrocyte activity of dermis, the decrease and fracture of collagen fiber, resulting in the decrease of skin elasticity and the increase of canthus wrinkles.  

Degeneration of elastic fibers  

Crow's feet  

From medical point of view, this kind of furrow is the third party is because elastic fiber is aging gradually, skin moisture and hypodermic adipose decrease, make the skin loses elasticity, and those who get hypodermic muscle pull and form.  In addition to natural skin aging, the main factors were sun exposure, skin thickness, subcutaneous fat, smoking history, and the amount of contraction of the lateral orbicularis oculi muscle when smiling or squinting.  

Collagen break  

Wrinkles, crow's feet, eye lines, and fine lines are oxidation lines.  Because the collagen, etc are susceptible to light, heat and ozone or other factors of oxidation damage, seriously cortex of collagen was oxidation for the various causes of the above, just like spring fracture, fracture after collagen, support for the skin effect disappears, so cause uneven skin will a collapse, so the crows feet just oxidation lines of a form.  

Climate and personal factors  

The formation of crow's feet and sun, dry, cold, wash face water temperature is too high, rich expression, smoking and other fiber tissue elasticity decline, resulting in increased wrinkles around the eye.  Crow's feet radiate due to dynamic wrinkles caused by long-term contraction of the orbicularis oculi muscle.