I Have A Big Bruise On The Inside Of My
Antiinflammatory drugs or anticoagulants may cause bruising.
Hello dear, welcome to Ask a doctor's service.
I read your query and here is my advice.
I think it would be better if you upload a photo of the bruising in reports in order that I can see it.
The main cause of a bruising is trauma and if you hurt the leg to something the bruising happened. Also if you have been on anticoagulants it is more likely to have bruising due to minor trauma. Also some anti-inflammatory drugs may cause easy bruising also. Taking anti-inflammatory drugs for knee pain may cause the bruising.
It you have poor circulation on the leg it is more like for trauma to happen.
If the knees are hurting this can't cause bruising on outside.
Hope I have answered the question.
Let me know if I can assist you further.