Thanks for writing in.
Currently your symptoms are not suggestive of lupus. If the rash on your back is associated with itching and a rash, it is likely to be a fungal infection
If there is no rash or itching, its likely to be a bruise
as a bruise would tend to clear in the centre first.
The tendency to bruise easily needs to be investigated. Please get a prothrombin time
(PT/INR) and PTT done. Also, a platelet count
would be needed.
Once we have the results we can take this further.
Hope this helps.