If you're asking about the effects of smoking a very small amount of a cigarette, the risks are still present, though the immediate impact might be less noticeable compared to smoking more. Even small amounts of smoking can have negative effects, including:

Exposure to Harmful Chemicals: Cigarettes contain numerous toxic chemicals, and even a small amount of smoke can introduce these substances into your body.

Addiction Risk: Nicotine is addictive, and even minimal use can contribute to dependence over time.

Respiratory Irritation: Even a small amount of smoke can irritate your airways and lungs.

In general, there's no completely safe level of smoking, and reducing or quitting is the best way to minimize health risks. If you're considering smoking or are concerned about its effects, it's a good idea to consult a healthcare professional for advice.