Skin hyperpigmentation is caused by emosiderin deposits in the subcutaneous tissue, that is, the iron content in the red blood cells that escapes from the vessels .This process can lead to eczema changes and hardening of the skin. A “woody” hardening of the affected areas characterizes lipodymatoscrosis, which is a similar process to cicatrization.
The laser treatment, acting on pigment, firstly allows a “clearing” of the skin, but mainly modifies the elasticity of the tissues by stimulating collagen, thus preventing “hardening” of affected skin areas.
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