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The exogenous phase is a part of the hair growth cycle that describes the process of active hair loss. During the entire life cycle of a hair, it goes through various phases: Anagen phase (growth phase), catagen phase (transition phase), telogen phase (resting phase) and finally the exogen phase (shedding phase). In the exogenous phase, the hair detaches from the hair follicle and eventually falls out, paving the way for the growth of a new hair.
In contrast to the telogen phase, in which the hair remains inactive in the follicle, the exogen phase is characterized by the active loss of telogen hair. The duration and intensity of hair loss during the exogenous phase can vary greatly from person to person and is influenced by various factors such as age, diet, state of health and genetic predisposition.
Although hair loss in the exogen phase is a natural and necessary part of the hair growth cycle, increased or altered activity in this phase may indicate hair problems or underlying health conditions. Therefore, understanding the exogen phase and its role in the overall context of the hair cycle is important for the assessment of hair health and the diagnosis of hair loss problems.
Related terms: Anagen phase / catagen phase / kenogen phase / telogen phase / growth phases
