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Comedones

Skin bumps - acne-like; Acne-like skin bumps

Comedones are small, flesh-colored, white, or dark bumps that give skin a rough texture. The bumps are caused by acne. They are found at the opening of skin pores. A solid core can often be seen in the middle of the small bump.

References

Habif TM. Principles of diagnosis and anatomy. In: Habif TP, ed. Clinical Dermatology. 5th ed. Philadelphia, PA: Elsevier Mosby; 2009:chap 1.

Zaenglein AL, Thibouto DM. Acne vulgaris. In: Bolognia JL, Jorizzo JL, Schaffer JV, et al, eds. Dermatology. 3rd ed. Philadelphia, PA: Elsevier Mosby; 2012:chap 36.

    • Acne - close-up of pustular lesions

      Acne - close-up of pustular lesions - illustration

      Acne lesions frequently contain pus. This close-up photograph shows small acne pustules with surrounding inflammation (erythema).

      Acne - close-up of pustular lesions

      illustration

    • Blackheads (comedones)

      Blackheads (comedones) - illustration

      Blackheads, or open comedones, are common in acne. Clogged hair follicles reflect light irregularly to produce this black hue.

      Blackheads (comedones)

      illustration

    • Blackheads (comedones) close-up

      Blackheads (comedones) close-up - illustration

      Blackheads, or open comedones, are common in acne. Clogged hair follicles reflect light irregularly to produce this black hue.

      Blackheads (comedones) close-up

      illustration

    • Acne, cystic on the chest

      Acne, cystic on the chest - illustration

      Cystic acne may occur across the upper chest as well as on the back.

      Acne, cystic on the chest

      illustration

    • Acne, cystic on the face

      Acne, cystic on the face - illustration

      The face is the most common location of acne. Here, there are 4 to 6 millimeter red (erythematous) pustules, some with bridging scars and fistulous tract formation (connecting passages). Severe acne may have a profound psychological impact and may cause scarring. Effective treatments are available for this type of acne.

      Acne, cystic on the face

      illustration

    • Acne, vulgaris on the back

      Acne, vulgaris on the back - illustration

      Acne frequently occurs on the back. Here, there are 2 to 6 millimeter wide erythematous (red) pustules with large open and closed comedones. Permanent scarring may follow a severe case of acne. Men are more often affected on their shoulders and back than are women.

      Acne, vulgaris on the back

      illustration

    • Acne, close-up of cysts on the back

      Acne, close-up of cysts on the back - illustration

      Cystic acne, or nodulocystic acne, is the most severe form of acne. Both pustules and hard red bumps are present in the skin. This form of acne is more difficult to treat and often requires taking an oral vitamin A derivative.

      Acne, close-up of cysts on the back

      illustration

    • Acne, cystic on the back

      Acne, cystic on the back - illustration

      Cystic acne, or nodulocystic acne, is the most severe form of acne. Both pustules and red bumps are present in the skin and scarring can be seen. The back is a common site for acne.

      Acne, cystic on the back

      illustration

      • Acne - close-up of pustular lesions

        Acne - close-up of pustular lesions - illustration

        Acne lesions frequently contain pus. This close-up photograph shows small acne pustules with surrounding inflammation (erythema).

        Acne - close-up of pustular lesions

        illustration

      • Blackheads (comedones)

        Blackheads (comedones) - illustration

        Blackheads, or open comedones, are common in acne. Clogged hair follicles reflect light irregularly to produce this black hue.

        Blackheads (comedones)

        illustration

      • Blackheads (comedones) close-up

        Blackheads (comedones) close-up - illustration

        Blackheads, or open comedones, are common in acne. Clogged hair follicles reflect light irregularly to produce this black hue.

        Blackheads (comedones) close-up

        illustration

      • Acne, cystic on the chest

        Acne, cystic on the chest - illustration

        Cystic acne may occur across the upper chest as well as on the back.

        Acne, cystic on the chest

        illustration

      • Acne, cystic on the face

        Acne, cystic on the face - illustration

        The face is the most common location of acne. Here, there are 4 to 6 millimeter red (erythematous) pustules, some with bridging scars and fistulous tract formation (connecting passages). Severe acne may have a profound psychological impact and may cause scarring. Effective treatments are available for this type of acne.

        Acne, cystic on the face

        illustration

      • Acne, vulgaris on the back

        Acne, vulgaris on the back - illustration

        Acne frequently occurs on the back. Here, there are 2 to 6 millimeter wide erythematous (red) pustules with large open and closed comedones. Permanent scarring may follow a severe case of acne. Men are more often affected on their shoulders and back than are women.

        Acne, vulgaris on the back

        illustration

      • Acne, close-up of cysts on the back

        Acne, close-up of cysts on the back - illustration

        Cystic acne, or nodulocystic acne, is the most severe form of acne. Both pustules and hard red bumps are present in the skin. This form of acne is more difficult to treat and often requires taking an oral vitamin A derivative.

        Acne, close-up of cysts on the back

        illustration

      • Acne, cystic on the back

        Acne, cystic on the back - illustration

        Cystic acne, or nodulocystic acne, is the most severe form of acne. Both pustules and red bumps are present in the skin and scarring can be seen. The back is a common site for acne.

        Acne, cystic on the back

        illustration

      Review Date: 12/2/2014

      Reviewed By: Richard J. Moskowitz, MD, dermatologist in private practice, Mineola, NY. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

      The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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