On my left side?
Sometimes a tube, either a drainage tube or pain pump tube, can act like a wick and fluid can drain around the tube opening. This in and of itself is not of great concern. If it continues then you should notify your surgeon as soon as possible. Your plastic surgeon is in the best position to understand your surgery and treat any possible complications.
WIthout more information it is difficult to respond to this, but in general some blood may be apparent were the pain pump exits the skin.