To keep your armpits clear and prevent future blockages, adopt these habits: Hidradenitis suppurativa (HS) - NHS
It is important to understand what might be causing the "blockage," as treatments differ: blocked sweat glands in armpit better
Do not scrub the area; you will rupture the follicle. Instead, use a cotton pad soaked with (Stridex pads work) or Glycolic acid (The Ordinary 7% Toning Solution). To keep your armpits clear and prevent future
Over-the-counter (first-line, mild cases) you will rupture the follicle. Instead
If the condition is persistent, painful, or involves recurring abscesses, professional intervention may be required: Blocked Hair Follicles: What You Can Do at Home - WebMD