My lymphoedema therapist finally helped reduce it a lot, before the last infection hit, by massage which I suppose is a form of compression. The fluid is supposed to disperse by itself but if you have a persistent friend, it just keeps doing one last performance, Melba like! My therapist also found a lump (eek!) - she didn't think it was anything serious but back to my surgeon and his ultrasound lady. 'It's a seroma' she said ( well we knew that, but what's the lump?'. 'It's a seroma' she said patiently, 'you have a seroma within a seroma'. Gimme strength!! But we got it all finally.