I've had MRSA on my leg twice, and yes, it's painful. The first time I took antibiotics without any change, then a salve the Dr gave me - sorry, I don't remember what it was, but it worked eventually.
About 5 years ago I got it again. I hit it with every home remedy I could think of such as crushed garlic and turmeric mixed with coconut oil under a small cloth bandage from old t-shirt. Left the turmeric on at night.
The two that finally helped the most was turpentine and oregano oil squeezed from a capsule, one at a time, right on it and covered with a small cloth bandage held on with tape. I alternated each several times the first day and by the next day I could see it shrinking. Kept it up for 4 - 5 more days till it had disappeared completely.
Also took the oregano in capsule form, 1500 mg. Three caps 3 times a day.
These days I keep a good quality turpentine and oregano oil caps on hand at all times along with Olive Leaf Extract/OLE. Turpines in the tree sap keep it protected from most infections and has been used since old Egyptian times.You can find a study done in France on the subject of turpines.
Worked for me, hope you get the help you need from all these suggestions.