I am 43 years old. Suffering since from last 4 to 5 years itching specially at evening time found rashes on the face as well as backside of the body. If touch itching then it becomes red rashes very big pimples on the back side. I have taken treatment last for 4 years. Tab levosiz 05 mg. But I feel very sleepy. And I am very fed up. please give me suggestions.