The basic prerequisite for a healthy scalp is an intact lipid film.
This consists of moisture from the skin’s pores and sebum, also known as lipids. The scalp’s protective acid mantle has an oily effect, simultaneously supplying your skin with sufficient moisture to prevent it from drying out.
However, if the function of this important protective layer is damaged in any way, your skin cannot retain this moisture and it becomes more susceptible to external influences.
The result: Dry scalp.
There are different reasons for this moisturising and oily lipid film becoming damaged.
Using incorrect and harsh products to care for your hair can be a reason for the acid protective mantle becoming affected. You might be using a shampoo that is not tailored to your scalp’s needs, causing it to act aggressively on your scalp.
When your scalp is exposed to too much heat in particular, it can cause your scalp to dry out. Washing your hair daily with hot water is just as problematic as blow-drying and excessively straightening your hair.
But you’re also doing your scalp no favours if you colour your hair frequently. In addition to incorrect care, diseases such as psoriasis or atopic eczema can also be the cause of dry, itchy scalps. But too much stress and advancing age are also contributing factors for dry scalps and annoying itching and dandruff.