<s>[INST] I have a dark coloration on my ankle bone(outside of foot) , developed it about 2 weeks ago, ankle slight tender, but I also have RA , feels uncomfortable when I roll my ankle back and forth , ankle slightly swollen , but is due to my RA, what can it be? Has not gone away, looks like color lightened a bit. [/INST] Hi  You have probably twisted / sprained your ankle causing swelling  and discoloration on the outside of your ankle which is going better now.Other possibility is that you might be having might be having ankle arthritis.  I suggest you get an X  Ray of the ankle to note any arthritis. Use Ankle support for mobilization. </s>