The body sends a plasma fluid to the area of injury to start the healing process. This fluid brings nutrients for healing and takes away waste. Some of the fluid will take the path of least resistance and drain out of the opening in the skin. Drainage that is yellow, pink, orange or brown is acceptable colors. It usually does not have an odor. If you note an odor, be sure you are cleaning the wound regularly. Call your doctor for evaluation if the color changes to green or is very bloody. Also, monitor for redness and warmth that spreads outward from the wound at the skin margins. Again, contact your doctor.