Clogged sinuses often cause stuffed ears, according to WebMD, since the passages are connected. To relieve clogged ears, take an over-the-counter decongestant, use a humidifier or saline nasal spray, and gently blow your nose.
Bending forward or lowering the head can make ear congestion worse, so keep the head upright as much as possible, recommends WebMD. Avoid extremely hot or cold temperatures, since this can worsen ear pressure. If the congestion is accompanied by pain, try an over-the-counter pain reliever, such as Tylenol, Motrin or Advil. Staying hydrated keeps mucus in the sinuses thin, so drink lots of water, especially during the evening hours.