Smoking after removal of impacted wisdom teeth still some numbness?

I had two wisdom teeth removed 3.5 days ago. I have little to no pain and the scab looks healthy. Having said this, I have some numbness in my chin and lip area (it shifts around but is constant just under the left lip) sometimes it tingles. When I was given the injection my vision was as if I was really drunk for about 30 minutes. My face is also quite swollen still but this was the same as last time too. My question is, when can I smoke and not be at risk of infection. Thanks a million,

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