What Causes A Dark Spot On The Lower Lip Along With Swelling?

I have a small, dark spot on my lower lip that appeared about 3 1/2 to 4 weeks ago. When I look at it, it does not appear to be directly on the surface of the lip. It does look symmetrical. I do not have any visually noticeable swelling of the lip, however, I feel as though my lip is swollen or occasionally tingly. I would not say that it is painful, simply uncomfortable and difficult to ignore. My lips have also been slightly chapped, so I have been applying chapstick. The chapped lips have subsided, but the dark spot and tingling sensation have continued. I am a 30-year-old male, and I am also a smoker. Naturally, due to this poor habit, I immediately assume the worst. There are no additional spots or patches in my mouth, and I have no swollen glands. That may be neither here nor there. I have taken ibprofuen for the swelling feeling, and this does seem to reduce the symptom. Any idea what this could possibly be? My google results produce a lot of terrifying images and dismal outlooks. However, nothing I have read includes anything involving lip sensations.

I appreciate any thoughts until I am able to schedule an appointment with a doctor.