If you have ~, the layer of flesh inside your sinuses is swollen and painful, which can cause headaches and a blocked nose.
N-UNCOUNT
If you have ~, the layer of flesh inside your sinuses is swollen and painful, which can cause headaches and a blocked nose.
N-UNCOUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012