My father is a gbs patient with a tracheostomy n has had no heart condition. but from the past two days he says his chest is tight. what could thatbe?

Chest tightness: chest tightness maybe caused by several reasons including pneumonia, heart failure, clots in he lung, bronchitis etc. he needs to be seen by a doctor to determine the cause

Other suggestions: There could be a mucus plug or granulation tissue blocking the tube. If the problem is lower in the airway, then a test dose of albuterol to open the airways can be given through the trach tube.