Thanks for all these additional details.
I can understand your concern.
Well, from the description it sounds to be Folliculitis.
It arise from Hair follicles and sebaceous (sweat) glands and occur due to the fact that hair follicles become infected, often with Staphylococcus aureus.
Excess sweating/ wearing tight clothes could cause such condition.
It is a quite common issue, and usually would get resolve with home measures.
To treat this condition, 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 use over-the-counter hydrocortisone cream to affected area.
You can take Tylenol for associated inflammation, it can be taken twice a day.
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 not share your towels or washcloths, and launder them in plenty of hot, soapy water after every use.
Usually such symptoms will get resolve in a week by these tips.
For peace of mind, please do get clinically examined from your doctor.
Hope this helped
If you have any further question then you can ask me.
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