Lump on ear

[Stela]

Hello i noticed days ago there was a small lump on my rabbit ear , I took him to the vet and they give an anti-inflammatory,but after a week the bump is still not going away ,what could be the reason?

 

[JBun]

Could you post a clear close up photo of it? It's hard to say what it might be from, without being able to see it.

 

[Stela]

Could you post a clear close up photo of it? It's hard to say what it might be from, without being able to see it.

Yes but its not visibile in photo