I have itching in my middle finger of left hand.The finger seems dry.Just tell me which disease is this so that I can get more information online and how to get rid of it.I am attaching the pictures.

It sounds like you may be experiencing a case of eczema on your middle finger. Eczema can cause itching, dryness, and redness of the skin. To help relieve the symptoms, you can try using a topical corticosteroid cream like Hydrocortisone 1% cream. Additionally, make sure to keep the skin well moisturized with a gentle moisturizer like Cetaphil or Eucerin. If the symptoms persist or worsen, it's best to consult with a dermatologist for further evaluation and management.