Oral sex. tested 2 wks for std and ngu. clear. no discharge.returned to clinic as tip of urethra irritated. swab= 7wbc=ngu. 1st ngu test wrong?

Maybe: Life is not exact. Tests are not perfect. Tests have false positives and false negatives...which is why their results must be interpreted in the context of a patient's symptoms, clinical situation, and risk factors. A positive result matching the symptoms is likely to be a valid result. A negative result matching the lack of symptoms is likely to be valid. Sometimes the unexpected happens in life.