Understanding Wound Drainage Types and Healing Process Wound drainage types , Drainage can be (1) serous (clear and thin; may be present in a healthy, healing wound), 2) serosanguineous (containing blood; may also be present in a healthy, healing wound), Tuscan Olive Pleated Dress Small Baltic Born Womens Marie Mock Neck Maxi Dress Dark Green Floral Size: XS Types Of Wound Drainage And How To Tell When It Is Serious