The yellowing of urine during weight loss may be due to endocrine imbalance in the body caused by excessive dieting and insufficient water intake during weight loss, and even symptoms of fire. Patients during weight loss will take dieting to lose weight, strictly control their diet, and even reduce the amount of water they drink every day resulting in thick blood, even causing patients to have dry mouth and dehydration. Excessive exercise leads to an increase in basal metabolic rate, which can easily lead to water loss in the body if water is not consumed in a timely manner, resulting in hypokalemia, muscle soreness and weakness. The yellowing of urine during weight loss may be caused by drinking too little water. During weight loss dieting, you should also drink water reasonably to ensure sufficient daily water intake to fully replenish the nutrients your body needs.