When you breastfeed, anything you put into your body can affect your breast milk. This includes cigarette smoke. If you smoke while breastfeeding, you are passing along the poisons in the cigarettes to your baby. This will further endanger his long-term health.
Second Hand Smoke and Its Affects on the Unborn Child.
Second hand smoke contains the same harmful chemicals, and when you breathe in this smoke during your pregnancy, you are putting your baby’s health at risk. In fact, it is advisable to ask everyone, including family and friends, not to smoke around you or the baby. Also, avoid places where you will be exposed to secondary smoke.