I am having very rough and dry skin at one finger from last 2 years. If I look closely it looks like drought land. Sometime it itches too.

You may be experiencing a condition called eczema. I recommend using a moisturizing cream containing 1% hydrocortisone to help with the dryness and itching. You can apply it to the affected area twice a day for up to 2 weeks. Additionally, you can use a gentle cleanser and avoid harsh soaps to prevent further irritation. If the symptoms persist, it is best to consult a dermatologist for further evaluation and management.