What Does Low WBC Count Indicate?

I have a son who cannot tell you his problem but he is now compleming of pain just recentally I was told his white blood cells are low his personitily has changed from being a lucky go person to being a behavorable problem and he will not sit up always wants to laid I have had him to doctors but no one seem to want to know the problem he points to his private parts and says here here where can I go next or what to do YYYY@YYYY