Throughout my teenager years and adulthood, I used to have canker sores in my mouth relatively frequently, though only to a limited extent that did not require any special treatment, for neither the number of ulcers nor their size was excessive. Last summer it occurred for the first time that a few lesions appeared on my penis, mostly on the inner or outer side of the foreskin, and once on the side of the penis. Their cycle of recurrence was a few weeks; their simultaneous number did not exceed two or three. Their appearance was similar to the oral canker sores I knew, but I have never seen genital herpes, and hence would be unable to recognize the difference. I currently have a few such lesions. My impression is that I have not had oral and genital ulcers simultaneously, or at least not in the last months. Many common causes of canker sores (fatigue, vitamine deficiency, lack of sleep, and stress) were certainly very applicable to the period when these lesions appeared and persisted, and are still partly applicable (the temporary disappearance of the lesions in January may have been caused either by their natural cycle or by my taking of B12 vitamine). In addition, I have sexual relationship only with a single partner ever since 2005, and to my best knowledge, my partner is also monogamous. She did not complain of similar symptoms, nor did I notice anything similar on her, but I know that herpes may occur without these visible symptoms. I intend to undergo a herpes test, but before doing so, it would be useful for me to know whether my symptoms could have been caused by canker sores or they are likely to indicate genital herpes. I am ready to answer questions if further details are needed. Since canker sores are not infectious but genital herpes is, the fact that I may have the second would necessitate to question my partner about her medical situation, and of course I do not want to imply that she may have contracted herpes somehow if this may later prove unfounded, and I actually have only canker sores.