These tender nodules are classic for cystic acne and are common in women older than 20 years. Instead of outgrowing acne in their teenage years, some people (such as this patient) develop frequent tender cystic acne lesions that often heal with hyperpigmented scars.
Acne is the most prevalent chronic skin condition in the United States, affecting up to 50 million people.1 Approximately 12% of adult women are affected.2 The main contributing factors include increased sebum production, follicular hyperkeratinization, microbial follicular colonization with Propionibacterium acnes, and an inflammatory reaction.3
Treatment is available in both topical and oral forms. Topical antibiotics are used predominantly for treating mild-to-moderate inflammatory acne. They are not recommended as monotherapy due to the risk for bacterial resistance; this can be prevented by adding benzoyl peroxide, which exfoliates and acts as an antibacterial agent. Clindamycin 1% solution or gel is the preferred topical antibiotic for treatment of acne.4
Topical retinoids can be used as monotherapy or in combination with antibiotics. They also can be used for maintenance after treatment goals are reached and systemic antibiotics are discontinued. Retinoids generally are applied in the evening because the sun weakens their effect. Patients on retinoids also are more sensitive to the sun and should be counseled to use sunscreen daily. Counseling on pregnancy risks and appropriate use of contraception also should be offered to patients using retinoids. It is advisable to consider the use of combination oral contraceptives, particularly in women who have adult-onset acne or experience flare-ups around the time of their menstrual cycle.3
Azelaic acid has anticomedonal, antibacterial, and anti-inflammatory properties and may be effective in treating mild-to-moderate inflammatory acne and hyperpigmentation. Salicylic acid also has comedolytic properties, although there have been limited studies examining its effectiveness. Both azelaic and salicylic acid are considered safe for use in pregnancy.
Oral antibiotics are recommended in the treatment of moderate-to-severe acne. Both doxycycline and minocycline are more effective than tetracycline for treating acne, with no clear superiority between the two.4 Macrolides also can be effective in treating acne, although their use should be limited to those who cannot tolerate tetracyclines. Systemic antibiotic use should be limited to 3 to 4 months due to decreasing efficacy over time and to minimize the development of bacterial resistance. If treatment goals are attained, the antibiotics can be replaced with retinoids.
Oral isotretinoin is reserved for treatment of severe nodular acne or moderate acne that is treatment resistant. Patients should be counseled on contraceptive methods, as isotretinoin is highly teratogenic and therefore prescribed through the iPLEDGE program.3,4
Given this patient’s persistent symptoms despite use of topical antibiotics and topical tretinoin, she decided to try oral antibiotics (doxycycline 100 mg twice daily) for 3 months and to start long-term oral contraceptives. If her symptoms continue, she will enroll in the iPLEDGE program and start treatment with oral isotretinoin.
Photo courtesy of Ayo Sorunke, MD. Text courtesy of Ayo Sorunke, MD, and Daniel Stulberg, MD, FAAFP, Professor and Chair, Department of Family and Community Medicine, Western Michigan University, Homer Stryker, MD School of Medicine, Kalamazoo.