A pea-sized, long-standing lesion that feels firm and contains trapped material is likely not a simple acne pimple. It could be a closed comedone, a small cyst, or a keratin-filled lesion where the contents are not coming out on their own. Since it has been present for 8 months and did not respond to benzoyl peroxide, it needs proper evaluation.
Next Steps
Do not try to squeeze or puncture it, as this can lead to infection, scarring, or pigmentation. Topical treatments alone may not be enough in such cases. A dermatologist may need to assess it and perform a simple in-clinic procedure such as extraction or minor drainage under sterile conditions. In some cases, additional topical or oral medications may be advised depending on the diagnosis.
Health Tips
Keep the area clean and avoid applying heavy or comedogenic products over it. Continue using a gentle cleanser and sunscreen, and avoid repeated touching or manipulation of the lesion. If it becomes painful, enlarges, or shows any changes, consult a dermatologist promptly for proper treatment and to prevent any permanent marks.