Thanks for contacting HCM
I am sorry to hear that you have been having blisters on your penis with associated
lymph nodes. I agree with you that the most likely cause is
herpes infection. But since the blisters ruptured and now you have additional bumps these lumps could be secondary bacterial infection. In this case you would need treatment for both the herpes and for secondary bacterial infection.
Another cause could be
syphilis as it can cause a non painful open sore on the penis. There are several other
STD that can cause open sores and lymph node enlargement.
I recommend that you seek medical attention to help diagnose and give you the proper treatment.
In summary
1. open sores penis
2. Probable STD
3. Possible causes Herpes, bacterial secondary infection, syphilis, Lymphogranuloma venereum
4. Seek medical attention for proper diagnosis and treatment
I hope I answered your question. Please contact HCM again with your
medical questions and concerns