There are many possible reasons why your skin feels itchy. The itch may be a result of an insect bite, or an allergic reaction to your clothes or cosmetic products. Skin dryness and low environmental humidity may also cause itchiness. Some other causes of itchiness include central nervous system disorders and psychological disorders. If the symptom persists or worsens, you should consult with a dermatologist to determine the cause of the itchiness and find the appropriate treatment.