Keloid steroid injections typically take several months to produce noticeable flattening. Most people need monthly injections for up to six months before seeing meaningful results, though some notice early softening after the first few sessions. The median number of treatment sessions is four, with some people needing as few as one and others requiring up to eight.
What to Expect in the First Few Weeks
After your first injection, you probably won’t see dramatic changes. The steroid works by slowing the overproduction of collagen that makes keloids thick and raised. It also suppresses inflammation, constricts blood vessels feeding the scar tissue, and allows your body’s natural collagen-breaking enzymes to start doing their job. All of this takes time.
Some people notice the keloid feels slightly softer or less itchy within the first couple of weeks. But visible flattening rarely happens after a single session. The most common injection schedule is once every four weeks, and treatment continues until the scar flattens or you’ve completed the recommended course. If the keloid fully flattens before your sessions are done, treatment stops early.
A Realistic Month-by-Month Timeline
Here’s a general sense of what the progression looks like for most people:
- Month 1 (after first injection): Minimal visible change. The keloid may feel slightly softer to the touch, and symptoms like itching or tenderness often improve first.
- Months 2 to 3: Early flattening becomes noticeable. The scar may start to look less raised and feel more pliable. Color changes, particularly reduced redness, can begin around this time.
- Months 4 to 6: This is when most people see the clearest results. The keloid continues to flatten and soften with each session. Some keloids require the full six months of monthly injections to reach maximum improvement.
Not everyone follows this exact trajectory. Some keloids respond faster, while others are stubborn. It’s worth knowing upfront that treatment doesn’t always result in complete regression. Multiple sessions are the norm, and partial improvement is still considered a good outcome.
Why Some Keloids Respond Faster
There’s no single test that predicts exactly how quickly your keloid will flatten, but a few patterns hold. Smaller, newer keloids tend to respond more readily than large, well-established ones. Thicker keloids with dense collagen require more sessions for the steroid to break down the excess tissue.
Your provider may adjust the steroid concentration based on the thickness of your keloid, using lower concentrations for thinner scars and higher concentrations for thicker, more resistant ones. The injection interval can also vary. While four weeks between sessions is the most common schedule, some treatment plans use intervals as short as one week or as long as six weeks depending on how your keloid is responding.
Combination Treatments Can Speed Things Up
If steroid injections alone aren’t producing results fast enough, your provider may suggest adding a second medication to the injection. Combining the steroid with a compound that blocks rapid cell growth has been shown to offer faster scar flattening than either treatment on its own. This combination tends to reduce scar height, improve pliability, and decrease pigmentation more quickly, with fewer side effects than using the steroid at higher doses alone.
This isn’t always necessary. Steroid injections on their own remain the first-line treatment and work well for many people. But if you’re several sessions in and progress feels slow, combination therapy is a well-studied next step.
Side Effects and How Long They Last
Steroid injections can cause changes to the skin around the injection site. The most common side effects are lightening of the skin and thinning (atrophy) of the tissue. Understanding their timelines can help you avoid unnecessary worry.
Skin lightening is more noticeable in people with darker skin tones and generally resolves within weeks to months after treatment ends. Skin thinning is a slower process. It typically begins two to three months after an injection and resolves over one to two years as the steroid deposits in the tissue gradually disappear. In rare cases, thinning has been reported to persist beyond five years, but this is uncommon. Your provider can minimize these risks by injecting precisely into the keloid tissue rather than the surrounding skin.
How Likely Is Recurrence
Even after successful flattening, keloids can grow back. Recurrence rates depend heavily on how the keloid was treated. When surgical removal is combined with steroid injections and careful technique, recurrence rates drop to around 13%. That’s a significant improvement over surgical excision alone, which carries recurrence rates of 45% to 100%.
For keloids treated with injections only (no surgery), some degree of regrowth is possible once treatment stops. This is why many providers recommend a maintenance plan or close monitoring after the keloid has flattened. If you notice the scar starting to thicken again, restarting injections early tends to be more effective than waiting.