Congestion may refer to:
Medicine Excessive fluid in tissues, vessels, or both, including: Edema, abnormal accumulation of fluid in the interstitium, manifesting as swelling Peripheral edema, edema in peripheral body parts such as limbs and feet Pulmonary edema, edema in the lungs that impairs breathing Congestive heart failure, heart failure resulting in congestion in one or more organs Nasal congestion, the blockage of nasal passages due to swollen membranes Pelvic congestion syndrome, chronic pelvic pain believed to be caused by enlarged veins in the lower abdomen Prostatic congestion, a medical condition that happens when the prostate becomes swollen by excess fluid Vasocongestion or vascular congestion, the not necessarily detrimental swelling of bodily tissue caused by increased vascular blood flow and a localized increase in blood pressure Congestion of the brain, an obsolete diagnosis for a variety of conditions including cerebral hemorrhage, seizures, depression, and headaches
Other uses Network congestion, reduced quality of service when a network is carrying more data than it can handle Traffic congestion, vehicles clogging streets and highways Transmission congestion, when an electric power grid is unable to transfer power from one area to another as a result of physical or organizational limits of the transmission infrastructure Congestion pricing, a system of surcharging users of public goods that are subject to congestion through excess demand Congestion game, a class of game in game theory that often represents many of the above items