What reason is skin often itch

Skin itching is a common phenomenon in life. The causes of skin itching are: 1. The skin is dry due to water shortage, and the skin is dry due to not drinking water frequently. 2. Parasites invade the skin, causing skin itching due to mites, lice, etc. 3. Allergy, such as regular consumption of seafood and spicy foods, or frequent contact with certain substances, thus causing skin allergies and itching. 4. Mental tension, because the spirit is often too tense, or the mood is often unstable, this will also cause the skin to itch frequently.