Hi there ...

I had to have mine drained twice ... once by nurse at Drs surgery and once by oncology nurse .. mine swelled up and started leaking, and was looking quite bluish ... 

If yours feels like it's getting hot, or colour change , deff needs seeing to .. if I were you I'd call 111 if it's just swollen, or if hot and inflamed , call A and E for their advice .. but you need to find out from them .. 

I know sometimes they leave it, and sometimes needs draining ..but give them a call ... 

Chrissie x