What Happens After the Injection
The Cortisone Shot for Acne can help reduce inflammation
Patients often come to Kare Plastic Surgery having never received a cortisone injection for acne before. Dr. Sierro walks every patient through exactly what to expect — during the procedure and in the days that follow. Understanding the timeline of response helps patients make the most of this rapid and effective treatment.
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The Injection
Dr. Sierro cleanses the skin over the acne lesion and injects a precisely calibrated micro-volume of triamcinolone acetonide directly into the cyst using a fine-gauge needle. The procedure takes under two minutes per lesion. Most patients describe a brief sting followed by mild pressure. No anesthesia is required. Multiple lesions can be treated in a single visit.
2–6 hrs
Initial Response
The corticosteroid begins suppressing the inflammatory cascade within the cyst. Some patients notice mild additional swelling in the first few hours as the injection distributes within the lesion — this is normal and temporary. Applying a cool compress can reduce any initial post-injection swelling.
24–48 hrs
Visible Improvement
Most patients see dramatic improvement within 24–48 hours — the lesion is significantly smaller, less red, less tender, and much less visible than before the injection. This is the window in which the cortisone shot is doing its most visible work. Patients with a major event scheduled 2–3 days out are typically well cleared of the treated lesion by the event date.
3–7 days
Full Resolution
The treated cyst is typically flat and much less erythematous within one week. Some residual post-inflammatory redness or hyperpigmentation may remain after the lesion itself has resolved — this fades over weeks to months and can be addressed with topical vitamin C, niacinamide, azelaic acid, or chemical peel treatment at Kare Plastic Surgery.
Acne Types Dr. Sierro Treats in Santa Monica
Cystic Acne
The most severe acne form — deep, painful, fluid-filled cysts that do not come to a head and cannot be effectively treated with topical products alone. Cortisone injections for individual lesions combined with systemic therapy (isotretinoin, antibiotics, or hormonal treatment) represent the evidence-based standard of care for cystic acne.
Nodular Acne
Firm, deep, painful inflammatory nodules without the fluid component of cysts — equally prone to scarring and equally responsive to intralesional cortisone injection. Nodular acne frequently requires prescription oral therapy in addition to injection treatment to achieve sustained clearance and prevent recurrence.
Hormonal Acne
Adult women experiencing acne flares around the menstrual cycle — particularly on the jawline, chin, and neck — are most commonly experiencing androgen-driven hormonal acne. Dr. Sierro treats hormonal acne with spironolactone, combined oral contraceptives, or targeted topical therapy depending on the patient's overall health profile and contraceptive preferences.
Adult Acne
Acne does not end at adolescence — an estimated 15% of women and 5% of men experience acne into their 30s, 40s, and beyond. Adult acne carries the same scarring risk as teenage acne and frequently requires systemic treatment to achieve clearance. Dr. Sierro addresses the specific hormonal, stress, and lifestyle drivers of adult acne with individualized treatment programs at Kare Plastic Surgery.
Teenage Acne
Adolescent acne is the most prevalent form of acne and a source of significant social and psychological impact during formative years. Early, effective treatment by a board-certified dermatologist dramatically reduces the lifetime burden of acne scarring. Dr. Sierro creates age-appropriate, evidence-based acne treatment programs for teenage patients at Kare Plastic Surgery, including topical retinoids, antibiotics, and isotretinoin when indicated.
Post-Inflammatory Marks
Even after acne lesions resolve, they leave behind post-inflammatory erythema (PIE — pink/red marks) or post-inflammatory hyperpigmentation (PIH — brown marks) that can persist for months. Dr. Sierro treats PIE and PIH with topical vitamin C, niacinamide, azelaic acid, tranexamic acid, and chemical peel protocols — fading residual acne marks while the active acne treatment continues.
Why treatment concentration matters: Cortisone shots for acne must be administered at the correct triamcinolone concentration to be effective without causing steroid atrophy — a depression in the skin caused by excessive corticosteroid in the tissue. Dr. Sierro uses precisely calibrated concentrations (typically 2.5–5 mg/mL for facial acne) and micro-volume injection technique to deliver the maximum therapeutic effect with the lowest risk of atrophy. Cortisone shots obtained from non-specialist providers at excessive concentrations carry a higher atrophy risk. Any atrophy that develops is almost always temporary, resolving over 3–6 months. Call (310) 998-5533.
Comprehensive Acne Treatment at Kare Plastic Surgery
Oral Isotretinoin (Accutane)
Oral isotretinoin — the brand name Accutane — is the only acne treatment that produces sustained remission in severe nodular and cystic acne, acting on all four pathogenic mechanisms of acne simultaneously. Dr. Sierro prescribes and manages isotretinoin courses for appropriate patients, including all required iPLEDGE program enrollment, monthly blood monitoring, and close follow-up throughout the treatment course. Isotretinoin is the most effective cystic acne treatment available when used appropriately under dermatologist supervision.
Hormonal Therapy
Women with hormonal acne — particularly jawline, chin, and cyclical flares — are candidates for anti-androgen therapy with spironolactone (25–200 mg daily) or combined oral contraceptives. Dr. Sierro evaluates each patient's hormonal acne pattern, health history, and contraceptive needs before recommending hormonal therapy as part of a comprehensive acne management plan. Spironolactone is particularly effective for adult female hormonal cystic acne that has not responded to topical treatments or antibiotics.
Topical Prescription Therapy
Prescription topical retinoids — tretinoin, adapalene, tazarotene — are the cornerstone of long-term acne management and acne scar prevention, accelerating cell turnover, preventing new comedone formation, and stimulating collagen remodeling in acne-prone skin. Dr. Sierro combines topical retinoids with appropriate antimicrobial agents, benzoyl peroxide, and barrier-supporting moisturizer protocols customized to each patient's skin type, acne severity, and tolerance profile.
Chemical Peels & Acne Scar Treatment
Superficial and medium-depth chemical peels using salicylic acid, glycolic acid, or trichloroacetic acid accelerate exfoliation, reduce post-inflammatory hyperpigmentation, and improve skin texture in acne-prone patients. For established acne scars — icepick, rolling, boxcar, or hypertrophic — Dr. Sierro coordinates with the plastic surgery team at Kare Plastic Surgery to provide microneedling, laser resurfacing, subcision, and filler-based scar treatment as part of a comprehensive acne scar management program.
"A cystic pimple that resolves on its own over three weeks has three weeks to damage the surrounding collagen. A cystic pimple that's treated with a cortisone shot on day one has 24 hours. That's the entire argument for why the injection matters — it's not vanity, it's scar prevention."
— Dr. Tiffany Sierro, MD · Board-Certified Dermatologist · Kare Plastic Surgery, Santa Monica
Related Resources at Kare Plastic Surgery
Frequently Asked Questions
Where can I get a cortisone shot for a pimple in Santa Monica?
Dr. Tiffany Sierro, board-certified dermatologist at Kare Plastic Surgery, provides same-day cortisone injections for cystic acne and inflammatory pimples at 804 7th Street, Santa Monica, CA 90403. Most patients see visible flattening within 24–48 hours. Call (310) 998-5533 to schedule — same-day appointments are available in most cases.
How quickly does a cortisone shot work for acne?
Most patients notice visible reduction in the size and redness of a cystic pimple within 24–48 hours of the cortisone injection. Full flattening typically occurs within 48–72 hours. The injected corticosteroid suppresses the inflammatory response within the acne cyst, causing rapid resolution and dramatically reducing the risk of post-inflammatory scarring compared to allowing the lesion to resolve on its own. Call (310) 998-5533.
Can cortisone shots cause skin atrophy or a dent in my skin?
When administered at the correct concentration and micro-volume by a board-certified dermatologist, cortisone shots for acne carry a low risk of temporary steroid-induced atrophy — a slight depression in the skin at the injection site. Dr. Sierro uses precisely calibrated triamcinolone concentrations to minimize this risk. Any atrophy that develops is almost always temporary, resolving over 3–6 months. The risk of steroid atrophy is significantly lower than the risk of permanent acne scarring from an untreated cystic lesion. Call (310) 998-5533.
What is the best treatment for cystic acne in Los Angeles?
The most effective treatments for cystic acne depend on the underlying driver — hormonal, inflammatory, or bacterial. Options include oral isotretinoin for severe cases, spironolactone or oral contraceptives for hormonal cystic acne in women, prescription topical retinoids and antibiotics for moderate cases, and cortisone injections for individual large cysts requiring rapid resolution. Dr. Sierro at Kare Plastic Surgery in Santa Monica designs individualized cystic acne treatment plans based on each patient's acne pattern, history, and goals. Call (310) 998-5533.
Related Resources at Kare Plastic Surgery