Hepatitis and inflammation of the liver. It is important to diagnose Lyme disease in the initial stages, as the disease becomes progressively more serious with time. If left untreated, hepatitis, which is an inflammation of the liver, can occur. This is an extremely serious condition, and the patient will suffer from intense pains in the stomach, indications of jaundice, such as yellow eyes, a queasiness of the stomach and darkened urine. At this point, restrictions to the diet and other serious lifestyle changes are necessary to treatment.