Lactic acid buildup has the potential to cause muscle cramps. Lactic acid is produced when the human body performs a large amount of strength training, and under normal conditions lactic acid can be metabolized by the human body. However, excessive fatigue will lead to disruption of the normal physiological functions of the muscles, resulting in an imbalance between the production and metabolism of lactic acid, resulting in excessive accumulation of lactic acid. Excessive lactic acid will stimulate the muscles, resulting in muscle contraction dysfunction, which will lead to the occurrence of cramps. Exercise should be carried out moderately and under the guidance of professionals. If symptoms of lactic acid buildup occur as a result of excessive exercise and are not relieved for a long period of time, you should go to a specialist in a regular hospital for targeted treatment by a doctor according to the specific situation, so as to avoid delaying your condition.