I recently had unprotected oral sex and have been stressed/paranoid about potential STDs and STIs. I have been checking my genitals often and noticed very small painless bumps on the skin of the shaft. At certain angles with a flashlight, I can see very small white-like hairs on some of the small bumps. These bumps are on my foreskin and are nowhere close to my pubic hair. I have only noticed them now because of my paranoia and checking for any changes on my genitals. What are these bumps and should I be concerned?

Welcome to the forum. I'm happy to address these issues.---

Thanks for the reply, Doctor Handsfield. I have scheduled for an STD check soon, it has been a bit over two weeks since the incident occurred. I am still concerned about the risk of being infected and am wondering how common is syphilis contracted through unprotected oral sex? I've recently gotten rashes, but feel like they are more heat rashes and have not noticed any ulcers or open sores.

Oral sex certainly can transmit syphilis, but of course the oral partner has to be infected and to have oral involvement. What was the nature of your partner? If high risk for syphilis (male i.e. MSM or trans) the risk would be a lot higher than for a female partner. In any case, a two week evaluation will the useless in regard to syphilis:  it takes 6 weeks for the blood test to become positive. Before then, all you can do is be on the lookout for a chancre, the open sore that is the hallmark of new syphilis. If that doesn't happen within 2 or sometimes 3 weeks of exposure, you can be very confident you don't have it. The skin rash of syphilis comes much later, typically 6 weeks to a few months.---

Thanks for the reply Dr. Handsfield. The nature of the involvement was I received unprotected oral sex from a female sex worker at a massage parlor in South East Asia. I have not noticed any symptoms of gonorrhea and chlamydia but am worried of being asymptomatic (what is the chance of that?) 

It is currently at the two week mark and I have not noticed any open sores besides what I think is a raised bug bit on my calf that I over scratched.

Contrary to common online misinformation, chlamydia is almost never acquired by oral sex, gonorrhea is uncommon from such exposures, and gonorrhea without symptoms is extremely rare. No STD is a likely cause of something like "a raised bug bite". You really needn't be worried, but of course you are free to be tested anyway for reassurance.---