Thanks for all these additional details and sharing clear pictures
I am sorry to hear about your problems.
Well, from the description and after looking at pictures, it doesn't sound to be allergic condition or yeast infection.
This doesn't relate with any serious STD. Please be relaxed and stop worrying.
No need to get panic. It is not an STD.
Yeast infection can be due a fungus called Candida albicans. The medical term for this infection is candidiasis.
Such pimple, like bumps can be ingrown follicles.
To treat this condition you need to apply clotrimazole cream two times a day on affected part.
You should take tablet claritin 10 mg once a day to control itching for one week. You should take an anti-inflammatory tablet like Motrin or Aleve 500mg twice daily for 5 days.
You can apply a warm, moist washcloth or compress to the affected area 4-5 times a day to relieve discomfort and help the area drain.
You can try over-the-counter hydrocortisone cream to affected area.
You should gently wash the infected skin twice a day with antibacterial soap or apply an over-the-counter antibiotic ointment.
You can use a clean washcloth and towel to dry off each time you wash.
You should wear cotton underwear.
You should wash the penis with warm saline water and dry off completely. Since yeast grows readily in damp conditions, you really need to dry the penis well.
Kindly follow above measures, and usually in 1 week, you would be free from symptoms.
Hope this helped
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