Swollen lymph nodes are one of the most common signs that your body is fighting something off. Also known medically as lymphadenopathy, this condition happens when the small glands of your immune system become enlarged. In this article, you will learn what causes swollen lymph nodes, what symptoms to watch for, and when it is time to visit your family doctor or a walk-in clinic.

What Are Swollen Lymph Nodes?

Lymph nodes are tiny, bean-shaped glands found throughout your body. They are part of your lymphatic system, which plays a key role in your immune defences. You have hundreds of them, but you can usually only feel the ones close to the surface of your skin.

When your body detects an infection or another health problem, lymph nodes can swell up as they work to filter out harmful substances. This swelling is called lymphadenopathy, but most Canadians simply call it swollen glands. In most cases, the swelling is temporary and harmless.

Lymph nodes are found in clusters in certain areas of the body. The most common places where people notice swelling are the neck, armpits, and groin. However, lymph nodes also exist in the chest and abdomen, where swelling is not visible but can still cause symptoms.

Common Causes of Swollen Lymph Nodes

The most frequent cause of swollen lymph nodes is a common infection. Your immune system activates your lymph nodes to help fight off the problem. Once the infection clears, the swelling usually goes away on its own within a few weeks.

Infections That Can Cause Swelling

Many everyday illnesses can trigger swollen lymph nodes. These include the common cold, the flu, strep throat, and ear infections. Dental infections and skin infections can also cause nearby lymph nodes to swell up quickly.

Some more serious infections can also lead to swollen lymph nodes. For example, mononucleosis (also called “mono” or the kissing disease) is well known for causing significant swelling in the neck. Learn more about swollen lymph node causes from Mayo Clinic.

Autoimmune and Inflammatory Conditions

Sometimes, swollen lymph nodes are not caused by an infection. Autoimmune diseases, such as lupus or rheumatoid arthritis, can cause your immune system to stay in an active state. As a result, lymph nodes may remain swollen for a longer period of time.

Certain medications can also cause lymph node swelling as a side effect. If you recently started a new medication and noticed swollen glands, let your family doctor or pharmacist know right away.

Cancer and Lymphoma

In some cases, swollen lymph nodes can be a sign of cancer. Lymphoma, which is a cancer that starts in the lymphatic system, is one example. Leukaemia and cancers that have spread from other parts of the body can also cause lymph node enlargement.

It is important to remember that cancer is not the most common reason for swollen lymph nodes. However, swelling that does not go away or that keeps growing should always be checked by a healthcare provider. Therefore, do not ignore persistent swelling.

Recognising the Symptoms of Swollen Lymph Nodes

The most obvious symptom of swollen lymph nodes is a lump or bump under the skin. These lumps can range from the size of a pea to the size of a grape or larger. They may feel tender or even painful when you press on them.

In many cases, swollen lymph nodes come along with other symptoms of illness. You might also experience a fever, a runny nose, a sore throat, or fatigue. These additional symptoms often give clues about the underlying cause.

Symptoms That Require Immediate Attention

Certain symptoms alongside swollen lymph nodes are more concerning. Seek care promptly if you notice hard or rubbery lumps that do not move when pressed. In addition, watch for lumps that grow quickly or that appear without any obvious infection or illness.

Other warning signs include unexplained weight loss, night sweats, and a persistent fever without a clear cause. These symptoms together can sometimes point to a more serious underlying condition. Healthline provides a detailed overview of lymph node symptoms to watch for.

How Are Swollen Lymph Nodes Diagnosed?

Your family doctor will usually start by asking about your symptoms and medical history. They will then feel the swollen area to check the size, texture, and tenderness of the nodes. This physical examination provides a lot of useful information right away.

Depending on what they find, your doctor may order blood tests to look for signs of infection or other conditions. In some cases, imaging tests such as an ultrasound or CT scan may be needed. If a more serious condition is suspected, a lymph node biopsy might be recommended.

What to Expect During a Biopsy

A biopsy involves removing a small sample of tissue from the lymph node for examination in a laboratory. This procedure sounds intimidating, but it is generally straightforward. It helps doctors determine whether the swelling is caused by infection, an autoimmune condition, or cancer.

In Canada, your family doctor can refer you to a specialist if further testing is needed. Depending on your province, this referral process and any additional tests may be covered under your provincial health plan. Always ask your doctor what to expect so you can plan accordingly.

Treatment Options for Swollen Lymph Nodes

Treatment for swollen lymph nodes depends entirely on what is causing them. There is no single treatment that works for every situation. The goal is always to address the underlying cause, and the swelling typically improves as a result.

If a bacterial infection is causing the swollen lymph nodes, your doctor may prescribe antibiotics. Viral infections, on the other hand, need to run their course. Rest, fluids, and over-the-counter pain relievers can help manage your symptoms in the meantime.

For minor discomfort, applying a warm, damp cloth to the swollen area can bring some relief. Furthermore, getting plenty of rest supports your immune system as it fights off the problem. Most infection-related swelling resolves within two to four weeks.

Managing Autoimmune and Chronic Conditions

If an autoimmune condition is the cause, your doctor will focus on managing that underlying disease. This often involves prescription medications that reduce immune system overactivity. With proper management, lymph node swelling related to autoimmune conditions can often be controlled.

When cancer is the cause, treatment will depend on the type and stage of the cancer. Options may include chemotherapy, radiation therapy, targeted therapy, or surgery. Your healthcare team will guide you through the most appropriate treatment plan for your specific situation.

In Canada, oncology services are available through provincial health systems. Your family doctor can refer you to an oncologist if needed. Health Canada offers resources to help Canadians navigate cancer care and other health services.

When to See a Doctor About Swollen Lymph Nodes

Many cases of swollen lymph nodes will get better on their own without any treatment. However, there are certain situations where you should see a healthcare provider. Do not wait if your symptoms concern you — it is always better to get checked.

Visit your family doctor or a local walk-in clinic if your swollen lymph nodes have been present for more than two weeks without improvement. You should also seek care if the swelling keeps growing, or if it does not seem linked to any obvious infection. Most provincial health plans cover these types of visits, so do not hesitate to reach out.

Go to an emergency room or call 911 if swollen lymph nodes are accompanied by difficulty breathing or swallowing. These symptoms can indicate a serious medical emergency that needs immediate attention. Your safety always comes first.

Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice. Always consult your family doctor or a qualified healthcare provider if you have concerns about your health.

Frequently Asked Questions About Swollen Lymph Nodes

Are swollen lymph nodes always a sign of something serious?

No, swollen lymph nodes are most often caused by common infections like a cold or sore throat. In most cases, the swelling goes away on its own within a few weeks once your body has fought off the illness. However, persistent or unexplained swollen lymph nodes should always be evaluated by a doctor.

How long do swollen lymph nodes last?

When caused by a minor infection, swollen lymph nodes typically shrink back to normal within two to four weeks. If the swelling lasts longer than this without a clear reason, it is a good idea to visit your family doctor or a walk-in clinic. Persistent swollen lymph nodes can sometimes indicate an underlying condition that needs treatment.

Can swollen lymph nodes be painful?

Yes, swollen lymph nodes can feel tender or sore, especially when they are caused by an infection. The pain usually gets better as the underlying illness improves. In some cases, swollen lymph nodes caused by cancer are not painful at all, which is one reason why size and persistence matter more than pain alone.

Where are swollen lymph nodes most commonly found?

Swollen lymph nodes are most commonly noticed in the neck, armpits, and groin, as these are the areas closest to the skin’s surface. However, lymph nodes also exist throughout the chest and abdomen. Swelling in those internal areas is not visible but may cause other symptoms such as chest discomfort or abdominal pain.

Can I treat swollen lymph nodes at home?

If swollen lymph nodes are linked to a mild infection, home care such as rest, fluids, and a warm compress can help relieve discomfort. Over-the-counter pain relievers may also ease any tenderness. However, you should see a doctor if the swelling does not improve within two weeks or if you develop other worrying symptoms.

Does COVID-19 cause swollen lymph nodes?

Yes, COVID-19 infection can cause swollen lymph nodes as part of the body’s immune response. In addition, some people notice swollen lymph nodes in the armpit after receiving a COVID-19 vaccine, which is a normal and temporary immune reaction. If you are unsure whether your swelling is related to COVID-19 or vaccination, speak with your family doctor or check guidance from Health Canada.

Key Takeaways

Swollen lymph nodes are a common sign that your immune system is responding to an infection or illness.
The most frequent causes are everyday infections like colds, flu, and strep throat.
Most swollen lymph nodes go away on their own within two to four weeks.
Warning signs include swelling that lasts more than two weeks, grows quickly, or is accompanied by unexplained weight loss or night sweats.
Treatment depends on the underlying cause — from antibiotics for bacterial infections to specialist care for autoimmune conditions or cancer.
In Canada, your family doctor or local walk-in clinic is a great first stop for any concerns about swollen lymph nodes.
When in doubt, always consult a qualified healthcare professional for a proper diagnosis and personalised advice.