hi. based from your description, it could be folliculitis. this usually occurs after shaving, when hair is accidentally pulled out and inflammation and infection occurs, or when there s an irritation or an inflammatory reaction from chemical contents of your deodorant. inflammation from uninfected follicles will subside in a few days time on its own. if the lesion, gets infected, a cyst or an abscess formation (hidradenitis suppurativa) might ensue. if symptoms persist, a consult with your general surgeon is best for clinical evaluation. management (medical and/or surgical) will be directed accordingly. hope this helps. good day!! ~dr.kaye