Costochondritis doesn’t typically look like anything from the outside. That’s part of what makes it so frustrating. The inflammation happens in the cartilage connecting your ribs to your breastbone, and in most cases there’s no visible swelling, redness, or change in appearance on the chest wall. What costochondritis “looks like” is really about how it presents: where the pain shows up, what triggers it, and how it behaves over time.
Where the Pain Shows Up
Costochondritis targets the joints where your rib cartilage meets your breastbone (sternum), most commonly at the second through fifth ribs. The pain sits on the front of your chest, usually on one side, though it can affect both. It often radiates outward to your arms and shoulders, which is one reason people frequently mistake it for a heart problem.
The hallmark finding is point tenderness. If you press along the edges of your breastbone and hit a specific spot that reproduces your pain, that’s the classic sign. This reproducible tenderness is the single most important feature doctors use to identify costochondritis, and it’s something you can often feel yourself at home.
What the Pain Feels Like
At rest, costochondritis usually feels like a low, dull ache near your affected ribs. The pain can shift suddenly to sharp or stabbing when you move your chest or torso. Some people describe it as pressure. The intensity varies widely from person to person and even day to day.
Specific movements make it noticeably worse:
- Taking deep breaths or breathing heavily
- Coughing, sneezing, or vomiting
- Twisting your torso
- Reaching overhead
- Hugging someone
- Exercising
- Lying on the affected side
The pain tends to come on gradually rather than all at once. Most people notice it building over days or weeks, not appearing suddenly the way a pulled muscle might. It can also be recurrent, flaring up, settling down, and returning weeks or months later.
Why There’s Usually Nothing to See
Standard costochondritis doesn’t produce visible swelling. The inflamed cartilage sits beneath skin, muscle, and tissue, and the inflammation is subtle enough that it doesn’t change the surface appearance of your chest. Imaging often comes back clean too. Most cases are diagnosed through a physical exam alone, without X-rays or scans. The American College of Radiology notes that costochondritis accounts for about 42% of nontraumatic musculoskeletal chest wall pain, and in most cases, a physical exam is all that’s needed.
When imaging is used, bone scans can sometimes detect the inflammation, picking up positive results in roughly 71% of confirmed cases in one study. But this type of imaging isn’t typically ordered unless a doctor needs to rule out something else, like a fracture or infection.
The Exception: Tietze Syndrome
There is one related condition that does produce visible changes. Tietze syndrome is a specific form of rib cartilage inflammation that causes noticeable swelling near the upper breastbone, typically at the second or third rib. You might see a small, puffy lump that’s firm to the touch. The area can also feel warm and appear red or discolored.
Tietze syndrome differs from regular costochondritis in a few key ways. It usually affects just one of your top four ribs rather than several. The swelling is its defining feature and is often the last symptom to fade. If you can see or feel a visible bump along the edge of your breastbone, Tietze syndrome is the more likely explanation than standard costochondritis.
How It Differs From Heart-Related Chest Pain
The overlap with cardiac symptoms is the reason most people end up searching for information about costochondritis in the first place. Both can cause chest pain that radiates to the arm and shoulder. But they feel meaningfully different.
Costochondritis pain is sharp, stabbing, or gnawing, and it clearly worsens when you breathe deeply, cough, or move your chest. It’s also tender to the touch. Heart attack pain, by contrast, is more often described as squeezing, tightness, or pressure, sometimes compared to the feeling of something heavy sitting on your chest. Cardiac chest pain doesn’t typically get worse when you press on your sternum or twist your body, and it doesn’t improve with rest and anti-inflammatory treatment the way costochondritis does.
That said, chest pain always warrants attention. The distinction between the two can be difficult to make on your own, especially during the first episode.
Who Gets Costochondritis
Costochondritis is more common in women than men. It can occur at any age but tends to appear in young adults and middle-aged people. Common triggers include physical strain on the chest wall (heavy lifting, intense exercise, repetitive arm movements), prolonged coughing from respiratory infections, and sometimes no identifiable cause at all. Many cases are labeled idiopathic, meaning they develop without a clear preceding event.
How Long It Lasts
Costochondritis is a self-limiting condition, meaning it resolves on its own. For most people, the pain improves over several weeks to a few months with rest and over-the-counter anti-inflammatory treatment. Avoiding the specific movements that trigger your pain speeds recovery. Applying heat to the area and gentle stretching can also help.
Some people experience recurring episodes, where the pain returns after a symptom-free period. This doesn’t mean the condition is worsening. It’s a known pattern of the condition, and each flare typically follows the same course of gradual improvement. If your pain persists beyond a few months or changes in character, that’s worth a follow-up evaluation to make sure nothing else is contributing.