Causes:
There are a number of causes for scalp itch. It is often seasonal, occurring during the winter months because of the concomitant drop in humidity, which causes drying of the skin. Scalp itch can also be caused by allergies, dandruff, mites, seborrheic dermatitis, and psoriasis.
Stress is also a cause for an itchy scalp, as some people unconsciously pick at their scalp. Stress can also worsen an existing skin condition like seborrhea, thus intensifying the itch.
Occasionally, using inappropriate or too many hair products can irritate the scalp causing itchiness. Many hair care products on the market are too harsh for the scalp and some people's itch is a reaction to the chemicals in the products. Two particularly popular culprits are para-phenylenediamine (in home hair dyes), and glycerylthioglycolate (a perm activator). They are both known to cause itching and even blistering in sensitive individuals.
What to Expect:
The outcome depends on the cause, genetics, biological factors, and stress management.
