Weight gain recovery time after drinking a lot of water is as follows: 1. As long as the body’s kidney function and heart function are normal, the excess water intake can usually be excreted through urine within a few hours, and the weight gain due to water intake can return to normal. The weight of a person will not only be affected by drinking water, but may also be affected by the intake of other foods, as well as urination, evaporation of sweat, loss of water from the digestive tract, and many other ways, so weight will certainly fluctuate. 2, if the heart and kidney function is impaired, the ability to excrete water is impaired, and after drinking a lot of water may lead to fluid accumulation causing edema, the increased weight is usually more difficult to recover The increased weight is usually more difficult to recover, and may require the use of diuretics and other treatments to be able to recover the increased weight.