There are many diseases that can cause high potassium, such as intestinal diseases, such as gastroenteritis and ulcerative colitis, etc. These intestinal diseases tend to absorb too much potassium from the outside world and cannot excrete it through the body, thus causing an increase in the potassium level in the body. In addition, diseases that cause high potassium levels may be liver and kidney diseases, such as glomerulonephritis, kidney failure, hepatitis, etc. These liver and kidney diseases may cause the body’s filtration of potassium to become low, thus causing potassium to remain in the body and not be metabolized, causing potassium levels in the body to increase. Since there are many kinds of diseases that cause high potassium levels, it is usually necessary to go to the hospital for appropriate tests to determine the cause of high potassium levels and then take reasonable treatment measures under the guidance of a doctor.