Noticed Soreness Under Foreskin. Tested Negative For STD. Feeling Tingling In Testicles. Worrisome
Thanks for your question.
I can understand your apprehension. Blood test for Sexually transmitted disease (STD) done to usually detect syphilis, HIV, gonorrhea, other non-gonococcal organisms and herpes. All the other minor STD's cannot be tested. The diagnosis is mainly established by clinical findings and relevant laboratory test.
If the doctor has examined you in person and all other test were not reactive, then this is unlikely to be related to STD's. So do not worry.
The scar tissue may have tingling sensation for some time and it may get accustomed after sometime.
The minor red blotches may have developed recently due to mild inflammation of your glans and foreskin caused either by yeast infection or some irritants such as soaps or antiseptics or any other topical applications. Do visit your dermatologist without fear of STD's. He/she can examine the red blotches and let you know the exact cause.
From your description, I do not find any reasons to worry.
Hope this helps. Let me know if you have any other inquiries.
Get well soon.
Dr S.Murugan