Dry & itchy skin for 2-3 weeks. when i scratch it leaves reddish bumpy lines. that usually take 12 hrs to disappear. what could it be?

Need to examine: It is not feasible to provide a meaningful opinion without taking additional history, physical examination and may be some tests. However, the response to scratching is normal. Try using an emollient, like Vaseline on the dry skin. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex.