Swollen lymph nodes feel like small, rounded bumps under the skin, typically in your neck, armpits, or groin. They’re usually soft or rubbery to the touch, can range from pea-sized to about the size of a grape, and often feel tender when you press on them. A node is generally considered enlarged when it’s bigger than 1 centimeter, roughly the width of a pencil eraser.
Where to Check
Lymph nodes sit in clusters throughout your body, but only a few groups are close enough to the surface for you to feel. The most common places to notice swelling are along the sides of your neck, just under your jawline, behind your ears, in your armpits, and in the crease where your thigh meets your torso (your groin). These are the areas worth checking if you suspect something is swollen.
It’s normal to feel small, pea-sized nodes in some of these spots even when you’re healthy, especially in the neck and groin. Kids under 10 can have nodes up to 2 centimeters that are perfectly normal because their immune systems are more active. What you’re looking for isn’t just the presence of a node but a change: something that wasn’t there before, or something noticeably bigger or more tender than usual.
How to Feel for a Lymph Node
Use the pads of two or three fingers, not your fingertips. Press gently in a circular or rolling motion over the areas listed above. You don’t need much pressure. A swollen lymph node from an infection will usually feel like a smooth, rubbery marble that slides slightly under your skin when you push on it. It may be tender or even a little warm.
Always compare both sides of your body. A single swollen node on one side of your neck with nothing matching on the other side is more significant than mild, symmetrical fullness on both sides. Be careful not to confuse other structures for lymph nodes. The salivary glands under your jaw can feel like lumps, and the carotid artery on the side of your neck pulses, which a lymph node won’t do.
What a Swollen Node Feels Like
The texture and tenderness of a swollen node tell you a lot. A node that’s enlarged because your body is fighting an infection is typically soft or rubbery, moves freely when you press on it, and hurts a little. This is the most common scenario, and it often shows up alongside other symptoms: a sore throat, runny nose, fever, or an infected cut nearby.
A node that feels hard, is stuck in place (doesn’t slide under your fingers), or isn’t painful at all has a different profile. Hard, painless, fixed nodes are more associated with serious conditions, including certain cancers. Rapidly growing nodes that get noticeably bigger over days or weeks also fall into this category.
Swollen Nodes vs. Cysts and Other Lumps
Not every lump under your skin is a lymph node. Cysts tend to feel firmer and more rounded than lymph nodes, and they usually stay fixed in place rather than sliding under your fingers. Cysts can also show up virtually anywhere on your body, while lymph nodes cluster in predictable locations. A fatty lump (lipoma) is typically soft, painless, and sits in a spot where lymph nodes don’t normally live, like the forearm or back.
If you find a lump in your neck, armpit, or groin that’s tender and appeared around the same time as a cold or skin infection, it’s very likely a reactive lymph node. If you find a painless, hard lump in an unusual location, or one that doesn’t match the rubbery, mobile profile of a typical swollen node, it’s worth getting checked.
Common Causes of Swelling
The vast majority of swollen lymph nodes are caused by infections. An upper respiratory infection, an ear infection, a dental abscess, or even a minor skin wound near the node can trigger swelling. In these cases, the node closest to the infection does the heavy lifting: a throat infection swells neck nodes, a hand wound swells armpit nodes, and a foot infection swells groin nodes.
When nodes swell throughout your body at the same time (you can feel them in multiple locations), the cause is more likely a systemic infection like mononucleosis or an immune system condition like lupus or rheumatoid arthritis. Widespread swelling is less common than localized swelling and generally warrants a medical visit.
Signs That Warrant Attention
Most swollen nodes from infections shrink back to normal within a couple of weeks as you recover. A node that doesn’t go away after that window, or one that keeps growing over time, is more concerning than its size alone. Increasing size and persistence matter more than hitting a specific measurement.
Key features that raise the level of concern include:
- Hard, painless texture that doesn’t feel rubbery
- Fixed position where the node doesn’t move under your fingers
- Rapid growth over days to weeks
- Location above the collarbone (supraclavicular area), which has a high association with malignancy. In one large hospital study, 55% of supraclavicular masses turned out to be malignant.
- Accompanying symptoms like persistent fever, drenching night sweats, or unexplained weight loss
Older age is also a risk factor. In children and young adults, swollen nodes are overwhelmingly caused by infections. In adults over 40 with a new, persistent node, the probability of a serious cause goes up.
What Happens if You Get It Checked
A doctor will feel the node and assess its size, texture, mobility, and location. They’ll also look for an obvious infection that explains the swelling. In many cases, the exam plus your symptoms are enough to confirm a reactive node, and you’ll be told to monitor it. If the node is suspicious (hard, fixed, or in a high-risk location like above the collarbone or near the elbow), the next step is usually imaging or a biopsy, where a small sample of the node is examined under a microscope.
For infection-related swelling, treating the underlying infection resolves the node. You may notice it shrinks gradually over a few weeks even after you feel better, which is normal. A node that was significantly enlarged can sometimes remain slightly palpable for months without it meaning anything is wrong.