When the colour of urine deepens, first consider the factors of diet, exercise and medication, whether it is a result of eating a lot of carrots recently, whether it contains too little water in general, whether it is a result of recent strenuous exercise with a lot of sweating leading to a large loss of body fluid which is not replenished in time, leading to an increase in plasma osmolality, causing a concentration of urine and yellowing of urine. If the urine remains yellow after lifestyle adjustments and does not improve, you need to seek medical attention.