If you wake up in the morning and there is more foam in your urine, there are many reasons. First of all, it is related to the food intake, because excessive intake of other foods such as protein, sometimes the urine will appear foamy. The second is due to diseases of the kidneys themselves, such as acute and chronic nephritis, kidney stones, kidney cysts, etc., which can also cause foamy urine when you wake up in the morning. In addition, there is also a relationship with weather changes, if the weather becomes cold, foam can also appear in the urine when you wake up in the morning. However, many patients are nervous when they see foam in their urine, thinking it is proteinuria, but it is not necessarily so.