Expired Permethrin - issue

I am 37 years old. Had protected sex 5 minutes and then condom was removed and hand job completed by her. The next morning for precaution I applied permethrin all over my penis – scrotum and peranial area. Around noon I started to feel a mild burning sensation near tip of urethra. I left the permetrin on for 8 hours and washed off. I did remember the area it was applied burned lightly all day. The burning and mild ache lasted the next 2 days. I was wooried it was an STD. On the 3rd day after exposure went to my GP and he did a urinalysys and STD panel. After 4 days the results came back all negative for STD’s. 2 weeks past and the burning and aching stayed constant inside the penis not urethra cause it never hurt to pee and no discharge. Also scrotum aching and mild burning as well.  so on the 3rd week went to GP and retested again. Again all STD’s are negative.

I went to urologist and he couldn’t find anything and just said its prosatitis. Gave me 1000mg Zithromax and 7 days of Doxy. Started this yesterday. I was losing my mind  to what this could be THEN I remembered the permethrin I did. I went to look at it and noticed the expiration date on it was from 2 years ago! My questions:

- Could not treating this expired Permethrin cause it to work down into my dermis and cause this constant burning and aching?
- If left untreated as I did would it cause an infection inside.
- Its been 6 weeks and still have the mild burning inside penis and scrotum external and ache.

[Alan Rockoff, MD]

Permethrin can cause mild irritation.  Expired or not, that's all it can cause, not damage.  The burning and ache are certainly from anxiety.  You have nothing to worry about.  You've been examined and tested.  Forget about it.  The pain and ache will go away.

Take care.

Dr. Rockoff

[Misterlonely2009]

-  Could this Permethrin(2 years expired) be the cause? If so PLEASE tell me what I can do do get it to STOP burning and aching.

I appreciate your time on this matter.

[Misterlonely2009]

In all respect this is not anxiety after 6 weeks of this. Im not anxious of an std but want to know whats causing this. This is actual discomfort all the time! Could anything topical that was used like the Nonoxnol9 in condom or spermicide or the dial antibactial soap I used cause this extended irritation? Please given my symptoms and what was done can you please suggest your thoughts on what this could be.