Hello and thanks for your post

I’m sorry you are worried about a lump at the back of your thigh and can understand you wanting to find out more.

I'm afraid we are unable to diagnose or tell anyone if anything is the matter. Symptoms can often have straightforward medical explanations but only a doctor can make a medical assessment so we always encourage people to make an appointment see their GP if their symptoms are persisting. Doctors are trained to assess symptoms and can arrange tests if they feel it’s necessary to try to find out what might be going on. 

I hope you know more about your situation soon.

Kind regards,

Celene