Hello, need to see the pic of your swollen finger. How did it occur? What about pain or fever?
Next Steps
Since 3 days did u apply any ointment over it or so? If it is swollen, it needs to be opened up with a hot n sterile needle n release the pus.
Health Tips
U will get relief from this sooner. After that we can prescribe treatment. Please do consult here for further details.