Side Stitches: Why They Happen and How to Stop Them

If you have ever been out for a run, feeling pretty good, and then suddenly a sharp pinch grabs you right under your ribs, you have met the side stitch. First thing to know: you are not broken, you are not doing it wrong, and almost every runner on the planet has felt this. It is one of the most common things that happens when you start running, and the good news is that it is harmless and very fixable.

Let me walk you through what a stitch actually is, why it shows up, and exactly what to do about it.

What a Side Stitch Actually Is

The fancy name is "exercise-related transient abdominal pain." Let's translate that into plain language: it is a temporary pain in your belly or side that comes on during exercise and goes away when you stop. That word "transient" is the kind part. It means the pain passes. It is not a sign that something is wrong with your body.

Most people feel it on the right side, just below the ribs, though it can show up anywhere across your middle. Researchers think it may involve the diaphragm (the big breathing muscle under your lungs), the ligaments that connect to your organs, or irritation of the lining inside your abdomen. The honest truth is that nobody knows the exact cause for certain. What we do know is how to make it stop and how to keep it from coming back.

Why Stitches Happen to Beginners

When you are new to running, your body is learning a brand new rhythm. A few common things tend to trigger a stitch:

• Eating too close to your run. A full or heavy stomach pulls on the connective tissue inside your belly and bounces around while you move.
• Shallow, fast breathing. When you only breathe into the top of your chest, your diaphragm never gets a chance to fully relax, and it can cramp up.
• Going too fast too soon. Pushing harder than your body is ready for is one of the most reliable ways to summon a stitch.
• A core that is still getting strong. Your deep abdominal muscles help stabilize everything in there. While they build up, things jostle more.
• Dehydration. Being low on fluids can make your insides more prone to cramping.

Notice a theme? Most of these are about doing a little too much, a little too soon. That is the most normal beginner thing in the world, and it gets better fast as your body adapts.

What To Do When a Stitch Hits

Okay, you are mid-run and a stitch grabs you. Here is your in-the-moment game plan, in order:

1. Slow down. Ease off your pace or drop to a walk. There is no shame in this at all, and it is genuinely the fastest fix. If you want permission in writing, here it is: it's okay to walk parts of the run.
2. Breathe deep into your belly. Put a hand on your stomach and push it out as you inhale slowly through your nose. Long, full breaths down low, not quick, shallow ones up high.
3. Exhale on the opposite foot. If the stitch is on your right side, try breathing out as your left foot lands. Switching which foot takes the impact during your exhale eases the tug on your diaphragm.
4. Press and exhale. Use two or three fingers to gently press into the sore spot while you breathe out fully. The pressure plus a long exhale can release it.
5. Stretch the side. Raise the arm on the painful side over your head and lean gently away, opening up that flank. Hold for a few breaths.

Work down that list and most stitches let go within a minute or two. Then you can ease back into your pace when it feels right.

How To Prevent Them Next Time

Stopping a stitch is good. Avoiding one is even better. These habits make a real difference:

• Give food some space. Try not to eat a full meal within two to three hours of running. If you need a little fuel, keep it small and simple.
• Warm up first. A few minutes of brisk walking before you run lets your body shift gears gently instead of getting shocked into a stitch.
• Build up gradually. Adding distance and speed slowly is the single best thing you can do for your whole body, stitches included. Easing in with a easing into running from zero with run-walk approach keeps the intensity low enough that stitches rarely get a foothold.
• Breathe on purpose. Practice those slow belly breaths even when you feel fine, so deep breathing becomes your default.
• Keep your pace easy. You should be able to talk in short sentences while you run. If you cannot, you are going too fast, and a stitch (or a tight calf) is more likely to show up.

By the way, if your legs are the part that seizes up instead of your side, that is a different gremlin. Here is the rundown on why your calves cramp when you start running so you have that covered too.

When To See a Professional

Side stitches are harmless, and they fade quickly once you slow down and breathe. That is the rule. The exception is worth knowing: if you feel sharp belly or chest pain that does not ease when you stop exercising, that keeps coming back without a clear reason, or that comes with symptoms like nausea, fever, or pain spreading into your arm or shoulder, do not tough it out. Check in with a doctor. That kind of pain is not a normal stitch, and it deserves a proper look.

You've Got This

A side stitch is one of those rites of passage that almost every new runner goes through, and now you know it is nothing to fear. Slow down, breathe low and deep, and it will pass. Build up gently, and they will get rarer and rarer until you barely think about them. Be patient and kind with yourself while your body learns this new skill, because it is learning fast, even on the days it does not feel like it. We are cheering you on every step of the way here at couchtotri.com, and we cannot wait to see where your running takes you.