Do not cough but have sputum spit consider and upper respiratory tract infection, bronchitis, pharyngolaryngitis, rhinitis, etc., in addition to long-term smoking, inhalation of dust and so on is also a common cause. 1. For patients with upper respiratory tract infections, bronchitis, pharyngolaryngitis, rhinitis, etc., can be due to bacterial, viral and other pathogens stimulation, so that the nasal cavity, pharynx, bronchial mucous membrane edema, exudate increase, and there is no coughing, but there is a sputum spat out of the feeling, generally by keeping the respiratory mucous membrane moist, pay attention to rest, drink plenty of water, and if necessary, active anti-infective treatment can be relieved in general. 2. Long-term smoking, long-term inhalation of dust and other people, because the mucous membrane of the respiratory tract is repeatedly stimulated by the irritant stimulation, so there may be no coughing but sputum spitting, generally by quitting smoking, stay away from dust and other ways, the symptoms can be relieved or disappear. If you feel unwell, you should seek medical advice in time and do not take medication without authorization.