it just popped up maybe a week ago. havent had sex in a month or so. do workout a lot regularly so sweat happens often, wear tight clothing. just anxious about this and seeking any advice is tender to the touch but other than that no pain. it is hard to the touch.
looks like the base of the hair follicle is infected u should just leave it b until it goes away
alrighty much appreciated! 
I always treat things like this with undiluted Liquid Antiseptic as this helps the healing process and prevents further infection - dab some on 2 or 3 times a day until it is completely healed.
When you work out you need to make sure you are wearing freshly laundered clothing as often as you can. After each session shower, use a clean dry towel each time, the towel should be one that ONLY you have access to / use of. It is essential that you fully dry yourself at the end of a shower as any moisture remaining can cause a real problem for the skin.
I do know this from personal experience - check areas that you would not usually look at such as the perineum - the area between anus and scrotum, as the skin can develop whitening that should not be present on healthy skin …