Thank you for your query at DoctorSpring.com
I understand you concern.
I have reviewed the images, and it looks more like an allergic response probably to the fabric or any possible cleaning agent they might have used.
Firstly, don't scratch it any further, as it increases the chances of the scabs getting infected.
You can take Tab. Claritin 10 mg once daily at bedtime for 3 days, and the itching as well as the scabs will reduce. If they do not respond to the medicine, let me know. This does not look like a STD.
Hope this was helpful,