You didn't say if the cough is dry or productive.

I developed a dry cough about 3 weeks after my RL lobectomy and my medical team kinda blew it off as irritation from the intubation tube, which struck me as strange as I didn't even have so much as a scratchy throat after my surgery.

A few weeks after developing the cough, I started having issues with SOB after exertion, so much that I went to the ER and was diagnosed with chylothorax. They performed a thoracentesis and removed 2 liters of fluid (chyle). After they did, my coughing immediately stopped and I remained cough-free for a few days until the fluid buildup reached the point of irritating things enough to start me coughing again.

Anyway, something to ask about