Excessive anti-streptococcal hemolysin O, caused primarily by streptococcal infections, usually indicates that the patient may have had a streptococcal infection within the last six months. Streptococcal infections typically present as pharyngitis, tonsillitis, arthritis, and rheumatic heart disease. Patients usually present with fever, cough, sore throat, and runny nose. When these illnesses occur, it is likely that the immune system produces this anti-streptococcal hemolysin O. However, a high level of this test can only be detected for a certain period of time after the infection. Therefore, it is likely that the patient had an infection some time before testing positive for this item. If the patient is not currently experiencing any significant symptoms and the routine urine test does not show any urinary proteins, there is nothing to worry about. If the patient develops any of these symptoms, he or she should go to the hospital for treatment to avoid progression of the disease.