From history it seems that you might be having recurrent ingrown hair follicle infection
As you are in menopause
there is likely of having some atrophic changes in vaginal mucous membrane
causing atrophic vaginitis
due to estrogen depletion.
you can apply Estrogen cream like novelon after consulting your Gynaec.
For having acute local infection, a course of antibiotic medicine prescribed by your doctor will give good relief.
Keep local hygiene clean, dry and airy.
Ok and take care.