What causes a sensitive scalp?
A sensitive scalp is particularly fragile. This fragility is the result of excessive stimulation of the nerve cells when faced with a natural deficiency of the hydrolipidic film (HLF).
In fact, the natural protection of the scalp, and of the skin, is normally provided by two elements:
- the HLF (which includes sebum and sweat)
- the microbial flora found on the surface of the epidermis.
A sensitive scalp is not a temporary condition. It is an intrinsic and permanent feature of the scalp.
Sensitivity is innate and ultimately without specific cause.
While it has no specific cause, this natural hypersensitivity is however aggravated by various factors:
- internal factors linked to stress, to the nervous or emotional state...
- external factors: repeated environmental aggressions (pollution, climatic changes), use of unsuitable hair products or techniques (aggressive care products, hair dryer temperature, etc.).
What are the action mechanisms of sensory perception?
Nerve endings in the dermis and epidermis can be activated by many external stimuli. The processed nerve message is then routed to the central nervous system before emerging in the brain.
A sensitive scalp is the result of these nerve cells being overly receptive to the information transmitted to them. This leads to an unpleasant sensation being perceived on the scalp.