Best way to get rid of fluid retention/blistering after lower and upper eyelid surgery?

It depends on how long after surgery you are. Usually there can be a variable amount of bruising and swelling for up to around 4 weeks after surgery. Thereafter the tissues soften and swelling should settle. Daily regular massage with a non-perfumed moisturizer can help, making sure you massage outwards (to gently empty the pockets of fluid outwards).