Lightheadedness after smoking is a common effect. It can be caused by nicotine’s effects on blood flow and may vary among different people. Genetics or certain conditions can also cause this symptom.

New research uncovers how heavy smoking rapidly disrupts blood and airway biology, revealing the hidden damage that accelerates disease risk in otherwise healthy adults. Study: The effects of heavy ...

There isn’t much research on those of us who bum a cigarette every so often, but here’s what we do know: Cigarettes are still ...