Hi
Thanks for posting your query.
One sided joint pain with swelling indicates arthritis. Now what is causing arthritis has to be evaluated.
Looking at the site ( Ankle joint ) my first probable diagnosis will be Gout. This is a condition where there will be excess of Uric acid in the blood which will get deposited into the joints and cause Arthritis.
It can be diagnosed by doing a test called Serum. Uric acid.
The other possibility is
infectious arthritis , which is infection of the joint but usually in this case there will be
redness over the joint and fever.
I recommend you to get Serum uric acid test done and if it comes normal then get an
x ray of ankle joint and Complete Hemogram test.
Till then apply crepe bandage over the joint , you can take
combiflam for pain relief.
Your elbow
bruise is not related to the ankle joint pain.
Hope this information was useful to you.
Any clarification feel free to ask.