Your liver could be filled with pinworms so find the cure for that. Other issues could be related to it, it's just a symptom. Find it out, no short-cut there.
For the immediate relief: Noxzema (that make-up removal creme), apply that around the area itching is happening. Must wear disposable gloves, pinworms are among the most contagious. Then do hygiene of personal stuff as suggested by others.