Lack of blood flow to the tip of my right index finger

Patient : Hi I am a 25 yr Caucasian male I'm a smoker average hight 85kl The of my right index finger is always cold it started about 3 weeks ago It is also slightly puffy not alot but I can notice the difference the cold starts Just past the nuckle about a I centre meter past. So my nail down I don't were a ring never have and sometimes it has less feeling then the other Tips of my fingers I tested pain response with a small needle prick And it is less sensitive
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