Out of curiosity, have you been formally tested for STD's since this started?
I have not been tested yet. there is no discharge, no pain during urination. just a little red around the opening of the urethra at times mainly after masterbation.
Ok, thanks for the reply
You may have a form of Urethritis. Urethritis (the structure that urine and semen flow through) is an inflammation caused by things like spermacides, STD's, E. Coli (same bacteria responsible for causing urinary tract infections), and yes, some STD's can cause urethritis. Also things like genital herpes and cytomegalovirus.
If you start having any burning while urinating, or discharge from your penis, or if your symptoms do not improve within 3-4 more days (that you are complaining of now), you will need to see your Dr for a STD check and also to check for UTI.
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Please ask for clarification if needed.
Needed to mention also that if you get tested and everything is clear, you might have a condition called Pudendal Neuropathy. It has many causes and can cause symptoms like burning, pins and needles, hypersensitivity, and even a twisting type pain.
You can read more about the causes here.