"He has toothache" or "he has a toothache" are both correct (and mean exactly the same thing), but "he has the toothache" is just wrong, at least in modern Engl

"He has toothache" or "he has a toothache" are both correct (and mean exactly the same thing), but "he has the toothache" is just wrong, at least in modern English (in the sense that no native speaker would say that)