Did it happen after a cold exposure?
Are you a smoker?
Any significant past medical or surgical history?
Are you on any medications or supplements?
No, it did not happen after a cold exposure. One morning I got up and my finger was swollen and it looked bruised, I thought that something bit me, started on the top and then little by little started turning black and blue and hurt a little bit and after 3 days it
disappeared. Thant happened 3 weeks ago, yesterday afternoon started again, turning black and blue and it is running, was a little bit sore and swollen.
I smoke but not a heavy smoker, only a couple in the evenings. I am not in any type of medications.
I am extremely sorry for the delay. I had an emergency surgery to do and need to rush for it. i apologize to keep you waiting.
A Raynaud's phenomenon has to be thought of for the diagnostic consideration for the discoloration of the finger. Nailfold capillaroscopy is the investigation of the choice with a colored doppler study of the upper limb vessels. That should be able to clinch the diagnosis. The cessation of the smoking with vasodilator medications are the suggested treatment.
Please feel free for your follow up questions.
Peripheral arterial disease or Raynaud's phenomenon is the possibility for the cause of the blue; black discoloration which spontaneously resolved. Please read these links, which will give you an idea and further detail;
It is pleasure and privilege assisting you.
Please let me know of your further queries regarding this.