ONE LARGE STRECH MARK ON GROIN

I am 19 yrs old and 2 weeks ago i had unprotected sex and now their is one large strech mark looking place that goes from the base of my groin to my inner thigh.  it is 1/4 an inch wide an about 2 inches long.   it is purplish in color and the skin feels very weird like the skin in the area is very thin could this ks an is their any chance this is a sign of hiv????  plz help ive been freaking out about this

[Bhupinder Kaur, MD]

Hello,
No this is not a symptom of HIV.Although I cannot confirm anything without examination but it can be erythrasma or intertrigo.

Erythrasma is a chronic superficial infection of the intertriginous areas of the skin.It is true that groins are affected but the typical appearance is well-demarcated, brown-red macular patches. The skin has a wrinkled appearance with fine scales.

The standard therapy of erythrasma is antibiotics and antifungals because it is caused by a bacteria C minutissimum.Erythromycin is the drug of choice.

Mild steroids are helpful in reducing the inflammation associated with it. But use it only after a dermatologist’s prescription. Also then get intertrigo ruled out.
I hope it helps. Take care and pls do keep me posted on how you are doing or if you have any additional doubts.Kind regards.