Lactic acid itself is not necessarily a problem in the body, as it is a normal byproduct of energy production. However, if the production of lactic acid exceeds the body's ability to metabolize or clear it, lactic acidosis can occur. Lactic acidosis is a potentially serious condition that can disrupt the body's pH balance and affect various organ systems. It may be caused by factors such as inadequate oxygen supply, liver disease, kidney dysfunction, certain medications, infections, or underlying metabolic disorders. Lactic acidosis can lead to symptoms like rapid breathing, nausea, weakness, confusion, and even organ failure if left untreated.