Hi , thanks for posting your query.
The red spot seems to be a boil or folliculitis
It can occur due to combination of factors like sweating , moisture, lack of aeration, shaving which can lead to multiplication of bacteria and hence infection.
To treat the same :
-apply an antibiotic cream locally twice a day.
-oral antibiotic may be taken by prescription.
-keep the area dry.
-maintain proper hygiene
-use cotton undergarments
-don't touch or scratch it as it will aggravate itching.
-avoid shaving till it heals
Hope this helps.