Brief Answer:
Provide more information

Detailed Answer:
Hello. Thanks for writing to us at healthcaremagic.

I am Dr. Kakkar. I have gone through your query and I have also had a look at the photographs. I can see an area of discoloration(?dry gangrene) along with nail dystrophy.

I would like to gather more information regarding the query in order to be able to guide you better.

-You have been on painkillers as mentioned in your treatment history. How well have they helped with the pain?
-Are you on medication for some other problem?
-Were you given any specific treatment for prevention or treatment of gangrene?
-When did you notice it first?Has it extended since you first noticed it?
-Do you have a history of discoloration of digit or digits? bluish or red discoloration? specially in cold conditions
-Do you use to smoke in the past? If yes, do you still smoke?

Kindly get back with the details.

---