Red spot below penis

Hello, im a 18 year old male and i have only been in one relationship, and had sex with the person, just the other day i noticed a red spot underneath my penis, it is round doesn't hurt, and doesn't look like a ulcer, i masturbate at least twice a day very roughly, i use no lube at all, like i said this doest hurt at all only when i rub it, it does seem to look like a blood blister, or a broken blood vessel but it is very round almost like a perfect circle.. any suggestions, someone told me it could be syphyllis chancre but their is no way, i had sex a year ago, and this just popped up, i haven't had any sexual activity since that person a year ago.

[Vanessa Lacuesta]

Hi,

This appears to be shiny, nonscaly and well circumscribed.

You have posted that this is not painful.Is this itchy?

A differential for this is a fungal infection (tinea) and a dermatitis. A vascular lesion may also be considered. However, does the red spot blanch when you press on it?

Another possible differential is a psoriasis.Here is a short description of penile psoriasis :

"Psoriasis is the most common inflammatory reaction affecting the genitalia. It may appear in 2 forms. Patients may develop bright red well-defined inguinal plaques known as inverse psoriasis. The scale so apparent in other parts of the body is not seen. No central clearing often seen in tinea is present. The plaque appears homogeneously erythematous. Similar lesions may be affect the axilla or the popliteal fossa. Unlike psoriasis elsewhere, inverse psoriasis may be itchy.Often, no past history of psoriasis is present."

Source:http://members.aapa.org/aapaconf2005/syllabus/5025GoldmanGenitaliaDerm.pdf

Have this assessed by your physician.This may not appear to be urgent given your insignificant sexual history. An initial  urinalysis and STD tests may be done nevertheless for baseline reference.

I know you are worried about this. Do not apply anything on the affected area until this has been evaluated by your physician.

[jtaturbo]

No its not itchy, and its not crusty, i went to the doctor today, got tested for std's or whatever and some other stuff, i was presbried a ointment and a medicine called doxycycl

[Vanessa Lacuesta]

Hi,

You doctor probably placed you on empiric or preventive therapy with the doxycycline ointment.The primary working diagnosis here may be a venereal disease.

I suggest that you follow your physician's advice.Complete the course of antibiotic treatment until your test results come out. At this point, your response to the medications may help determine what causes this penile lesion ( allow me to call it lesion). If this is likely bacterial in origin then it may readily respond to the ointment.

[jtaturbo]

the oitment i was given to use is ALTABAX and the pills i was given was DOXYCYCL

[Vanessa Lacuesta]

Hi,

Both of these are given for underlying bacterial infections.The pill is used to treat chlamydia and other organisms suspected to cause STD's. The ointment is a topical medication for infections caused superficially by staphylococcus aureus on the skin.

Have you been using them? If yes, how is your response to the medications? Has the penile rash improved?