maddy, I have been giving it some thought after your question, I think it is self inflicted, it isn’t red, inflamed, no fluid, just a very odd shape . Because I have brought on this wretched agoraphobia I am on the sofa every day, all day, head against one arm feet up on the other arm whilst I bang away on the iPad, posting here, playing games etc. The backs of my knees are sinking down towards the seat, if this makes sense, the sciatic nerve is tugging too. Very bad posture ?