If Your Kid Has a Hard Little Bump Just Below the Kneecap, Don't Just Wait for Them to Grow Out of It
A youth sports physical therapist explains what that bump really is, why rest and ice keep failing, and the 4 things he tells parents to look for so their kid can keep playing.
Youth Sports Physical Therapist · Updated October 2026
- That bump is called Osgood-Schlatter. It's common in kids 10 to 15 who jump, sprint or kneel.
- It's caused by the Tendon Pull: the knee tendon tugging on a soft growth plate, thousands of times a week.
- Rest and ice calm it down. But they don't stop the pull, so it comes back the second practice starts.
- The fix that keeps kids playing: steady pressure on the tendon, right below the kneecap, during practice.
- What that bump actually is
- Why it hurts some days and not others
- 6 fixes parents try, and why they fall short
- The 4 things to look for in a knee support
- What to expect, week by week
Almost every week, a parent sits down across from me, rolls up their kid's shorts, and points at the same spot.
Right below the kneecap. A hard little bump that wasn't there last year.
The kid is almost always between 10 and 15. Usually in the middle of a growth spurt.
Usually playing something with a lot of jumping or kneeling. Volleyball, basketball, soccer, dance.
And the first question is always the same. "Is that a bone? Did something break?"
Nothing broke. But most of these families have been dealing with it for months by the time I see them.
Here's how one mom described it to me last spring:
"She'd come off the court totally fine. Then around 9 at night she'd be on the couch with an ice pack."
"In the morning she'd walk down the stairs one step at a time, like an old lady."
"Our pediatrician said rest it, she'll grow out of it. So we rested it. Two weeks later she went back to club, and by the second practice she was limping again."
"Then one night she asked me if she should just quit volleyball. She's twelve. It's her whole thing."
If that sounds familiar, I want you to know two things.
First, this is very fixable. In most cases your kid does not need to quit or sit out the season.
Second, this isn't your fault. The standard advice just isn't aimed at the part of the problem that causes the pain.
The $400 Drawer of Things That Didn't Work
By the time families get to me, they've usually spent real money. It tends to look something like this:
And the kid is still limping down the stairs every morning after practice.
If you got here from my post about the bump, this is the article I promised.
Why I Stopped Giving Parents the Standard Advice
For years, I said what everyone says. Rest it. Ice it. Stretch. It'll go away on its own.
And technically, that's true. Osgood-Schlatter goes away once a kid stops growing.
But here's what that means in real life. "Until they stop growing" can take 12 to 24 months.
I kept watching the same cycle. Rest, feel better, go back, flare up, rest again.
Every flare-up chipped away at their confidence. Some started holding back on jumps. Some hid the pain from their coach. A few quietly quit.
Then a dad said something to me I've never forgotten:
He was right. So I started looking at what happens inside the knee during practice, not after.
What That Bump Actually Is
Your kid's thigh muscle connects to the kneecap.
The kneecap connects to the shin through a thick cord: the patellar tendon.
That tendon anchors into the top of the shin bone, right where the bump is.
In an adult, that spot is solid bone. In a growing kid, it's a soft growth plate. It's softer than the tendon pulling on it.
Every jump, sprint and landing, the tendon tugs on that soft spot. That's hundreds of tugs a practice. Thousands a week.
Add a growth spurt and it gets worse. Bones grow faster than muscles, so the thigh gets tight and every tug gets harder.
I call this the Tendon Pull. It's the whole problem in two words.
Here's the easiest way to picture it
Picture a rope tied to a fence post that was just set in wet concrete.
One tug won't do much. But pull it a few hundred times a day, five days a week, and the post starts to loosen. The concrete bulges up around it.
Why It Hurts Some Days and Not Others
The pain follows the pull almost exactly:
- Kneeling on a hard floor presses right on the bump.
- Jumping and landing pull hardest on the tendon.
- Stairs and squatting hurt the morning after a big practice.
- Lots of kids are fine during the game and sore that night, once the adrenaline wears off.
Your kid isn't being dramatic. The tendon pulled hard that day, and the soft spot is letting them know.
6 Fixes Parents Try (and Why They Fall Short)
None of these are bad ideas. Each one helps with something.
But none of them stop the Tendon Pull while your kid is actually playing. That's where the problem gets made.
A week or two off does calm it down. Everyone thinks it's over.
Then practice starts, the tendon pulls on the same soft spot, and a week later you're back where you started.
Both help with soreness after practice. I still recommend icing after hard sessions.
Great for protecting the bump from the floor, especially in volleyball.
This one's closest. A strap just below the kneecap is standard sports medicine advice for this exact problem, because pressure there takes some of the pull off the growth plate.
The trouble is the strap itself. Most drugstore straps are one stiff band sitting on its own.
Nice and warm. Gentle squeeze around the whole knee.
Stretching the thighs genuinely helps over time. Every kid I see gets a stretching routine.
What Actually Needs to Happen
My goal with these kids isn't to keep them off the court. Most of the time that isn't necessary.
My goal is to take some of the Tendon Pull off the growth plate during practice, so it stops getting stirred up every session while it finishes growing.
The simplest way to do that is the strap idea, done properly:
Back to the rope and fence post. Grab the rope partway down and hold it, and the post feels a lot less of every tug.
Your kid can still jump. The growth plate just stops taking the full force.
The 4 things I tell parents to look for in a knee support:
- A strap that sits right on the tendon, below the kneecap. Not a sleeve that squeezes everything evenly.
- Something holding that strap in place, plus support above the kneecap, so it can't twist or slip as the knee bends.
- A fit that stays put through jumping and diving. If it slides, it stops working.
- Thin and comfortable enough that your kid will actually wear it, under a kneepad and game shorts.
The sleeve I recommend has the tendon strap built right into it, so it can't twist or slip. It's slim enough for kneepads. $34.99, with a 30-day money-back guarantee.
See the Sleeve I Recommend →Your 3 Options, Side by Side
| Wait it out | Kneepad or basic sleeve | Tendon strap built into a sleeve (RecoverX) | |
|---|---|---|---|
| Stops the Tendon Pull during play | ✗ No | ✗ No | ✓ Yes |
| Can keep playing | ✗ Often benched | Plays, but sore | ✓ Yes |
| Stays in place | n/a | ✗ Slides, bunches | ✓ Two straps lock it |
| How long | 12 to 24 months | Same cycle repeats | Most feel a difference in week one |
| Cost | Missed seasons | $25 to $60, often wasted | $34.99, 30-day guarantee |
The Sleeve I Now Send Parents To
I'll be honest. I was skeptical of anything sold online for this.
Then a colleague who works with club volleyball teams told me about the RecoverX Knee Sleeve from Asoleo.
What caught my eye: the tendon strap is built into the sleeve. The sleeve holds the strap in the right spot. The strap gives the focused pressure.
So I tried it with my own patients. I showed parents where the lower strap goes and asked them to use it for every practice and game.
The first thing I noticed wasn't even the pain.
Then the follow-ups started sounding different. Less limping. Fewer bad mornings. Kids jumping again.
Here's how it lines up with my 4 things:
- A lower strap right on the tendon, just above the bump. You tighten it yourself, so the pressure goes exactly where your kid hurts.
- An upper strap and a cushioned ring around the kneecap that lock the sleeve in place, so the lower strap can't twist.
- A snug knit sleeve that stays where you put it, instead of bunching or sliding down.
- Slim and breathable, so it fits under kneepads, basketball shorts and dance tights. No stiff edges.
4 Kids I've Worked With
Before: winced on every dig. Two weeks off, and it came right back by the second practice.
What we did: sleeve under her kneepad for every practice and tournament, ice after long days.
Nightly ice packs mostly stopped in week one. Diving again by week three. Finished the season without sitting out a weekend.
Before: grew almost four inches in a year. Fine in games, limping down the stairs the next morning. His drugstore strap kept twisting around.
What we did: sleeve on for every practice.
Limp gone after the first few days. By the end of week two, the morning stairs weren't a thing anymore.
Before: kneeling and landing out of leaps were the worst. Anything bulky was out of the question.
What we did: the slim sleeve under her tights.
The first support she'd agree to wear. She stopped sitting out floor work at the end of class.
Before: bump on both knees. His parents were about to pull him from his travel team.
What we did: a sleeve on each knee for practices and games.
Playing full games without the post-game limp by week three. He stayed on the team.
These aren't clinical trial data. They're kids from my own practice, and every kid is different. But the pattern has been consistent enough that this is now the first thing I recommend.
What to Expect, Week by Week
When your kid wears it for every practice and game, here's what to watch for:
The knee feels more supported right away. In most cases the limping stops within the first few days.
Morning soreness is usually next to go. By the end of week two, most parents tell me the stairs are back to normal.
Kids stop thinking about their knee. Most are back to playing pain-free by around week three.
That lines up with what Asoleo found when they surveyed 300 RecoverX families:
One thing I want to be straight about. The sleeve doesn't make Osgood-Schlatter disappear. Only finishing growing does that.
What it does is take enough of the pull off that your kid can keep playing comfortably in the meantime.
And if it doesn't work for your kid, there's a 30-day money-back guarantee.
What Other Parents Are Saying
We'd been dealing with Osgood-Schlatter for 6 months and I was telling my son to just sit on the bench. His pediatrician said to try a good knee brace. The pain went from a 10 to about a 2. He made it every game and completed the whole season.
My daughter's knee was hurting so bad she was crying after practice. The difference is night and day. She can jump and run and move without worrying.
My son has been using this knee brace for a few days now, and it really provides solid support. The design is comfortable, breathable, and doesn't slide down during walking or exercise. It comes only one, so you need buy 2.
Ordered one, it was so good we immediately ordered a second. Finally something that actually stays on.
This is the second time I'm buying for my other kid. I like it.
Very comfortable and fully fulfills its function, excellent quality at an excellent price, 100% recommended.
Don't Let Another Season Go By
Here's where things stand if your kid has that bump.
The growth plate is soft. The tendon will keep pulling on it every practice until they stop growing.
Rest and ice will keep calming it down. Practice will keep stirring it back up.
Or you can take the pull off during the part of the day that causes the problem. A tendon strap built into a sleeve that stays put, for $34.99. Less than a single specialist copay.
Here's what you'll likely notice once your kid wears it for every practice:
- No more limping off the court or field
- Walking down the stairs normally the next morning
- No more nightly ice pack routine
- Diving, jumping and kneeling without holding back
- No more conversations about quitting
- Tendon strap built into a slim sleeve, so it stays in place
- Fits under kneepads, game shorts and dance tights
- Free shipping when you order 2 (great if the bump is on both knees)
- 30-day money-back guarantee
- Trusted by 30,000+ families
Dr. Scott Walsh, DPT
P.S. The question I get most: "How can a sleeve help a bone problem?"
Because Osgood-Schlatter isn't really a bone problem. It's a pulling problem.
The bone is fine. It's the Tendon Pull on a soft growth plate, over and over, that causes the pain and builds the bump.
That's why rest helps for a while and then stops helping. And it's why taking some of that pull off during play works.
And don't wait for the bump to go away as your sign it's over. The bump can stay for life. Watch the pain instead.
This article is a paid advertisement for Asoleo and is for general information only. It is not medical advice. Individual results may vary. Survey results are from an internal Asoleo survey of 300 customers. Patient stories reflect individual experiences and are not clinical trial data. RecoverX is a supportive knee sleeve, not a medical device, and is not intended to diagnose, treat or cure any condition. These statements have not been evaluated by the FDA. Always consult a healthcare professional for diagnosis and treatment. If a child is limping, they should not participate in sport until they have been checked.