 [ Symptoms ] they found a 4 cm cyst on my left kidney now grown to 7 cm [ Disease ] if you test was acccurate you were exposed in the past by someone unfortunately it is not possible to know who or when this might have occured once you have genital herpes it can go dormant suppressed by your immune system as we age that immune system can become weaker and the herpes virus can reactivate again herpes exposure could have occured anytime in your life even more than 25 years ago there are medications to help limit these outbreaks should this happen again so please discuss this with your doctor