Why Is Only My Left Leg Swelling? 7 Possible Reasons

Overview

Have you ever experienced that only your left leg got swollen? Most people notice this and get confused and worried. They expect both their legs to swell is something is wrong, but it could be concerned when it comes to one leg swelling which is more common in the left one.

If you are worried about “Why is only my left leg swelling?” This guide will definitely be for you to explain the possible reasons in simple words.

If only one of your legs is swollen, it’s also called unilateral leg swelling, and this can happen due to different reasons. Sometimes it does not lead to severity and may go away on its own without any treatment. Sometimes it may need medical care right away. Here we will discuss the most common reason for swelling in your only one leg. What will be the signs to recognize and when you should go to your doctor for appropriate treatment options.

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What are the causes of swelling in one leg?

Swelling, also called edema, occurs when extra fluid is come together in the tissues under your skin. If swelling happened in only your left leg the major cause is due to affecting may be one of these; let’s discuss them, keep reading.

• The blood flow
• Lymph system,
• Tissue in that specific leg

7 Possible reasons why is only my one leg swelling

Let’s look at these 7 possible reasons, keep reading and stay connected with us to delve deep into the topic.

1. Lymphedema

To remove waste and extra fluids, the lymphatic system is present in your body. If the lymphatic system gets disturbed or blocked, it can lead to swelling, usually in one leg.

What may cause lymphedema?

• Past surgery (especially cancer-related surgeries)
• Radiation treatments
• Infections
• Injuries
• Some people are born with it

Signs of lymphedema include:

• Swelling that doesn’t go away
• Heavy or tight feeling in the leg
• Skin that feels thick or hard
• More frequent skin infections

Note: While there’s no medicine for lymphedema, it can be managed. Treatments include wearing compression garments, massage therapy, and gentle exercise to help drain the fluid.

2. Deep vein thrombosis (DVT)

DVT is the serious reason for swelling in your only one leg. In this condition, blood clots form in the veins of one of your legs. This occurs when a clot builds up in a deep vein, usually in the lower leg or thigh.
If this clot travels to your lungs, deep vein thrombosis may lead to a life-threatening condition. So take it seriously.

Here are the signs you should recognize to get prompt medical assistance.

• Signs of DVT may include:
• Pain in the leg
• Warm skin on the swollen area
• Red or purple skin color
• Feeling of heaviness or tightness in the leg
• Sudden swelling in one leg

Note: If you think this is due to a blood clot, immediately set an appointment with your doctor. They may suggest you to get your ultrasound test done, and if DVT is found, medications can help disband the clot and prevent it from traveling to your lungs.

3. CVI (Chronic venous insufficiency)

Chronic venous insufficiency may be the other reason of swelling in left leg. CVI occurs when the veins in your leg can not push blood back as they normally do. As a result, blood stays in your one leg, causing discomfort and swelling.

Here are the signs of CVI

• Varicose veins (twisted or bulging veins)
• Swelling that gets worse after standing or sitting
• Pain that gets better when you raise your leg
• Brown or dry skin around the ankle

Note: CVI is not severe or life-threatening condition, but it can lead to persistent distress. Your doctor may suggest you to

• Keep your legs raised
• Wear compression socks
• Do light exercise to improve blood flow

4. Infection

Infection is one of the common reason of swelling in one leg, particularly if it impacts your skin or tissues in your leg. The most common infection is considered to be cellulitis of leg swelling. By these factors bacteria can enter into your body and cause cellulitis.

• Cut
• Bite
• Insect bite
• Scratch
• Signs of infection are:
  • Chills or fever
  • Tenderness or pain
  • Redness and warmth in the swelling area
  • Swelling that blows out quickly

Note: Your doctor will prescribe you antibiotics for the treatment of cellulitis. Keep noticing the signs and recognize them to get appropriate treatment.

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5. Trauma or injury

Currently, if you have hurt your left leg, even a small injury you may experience swelling. Common injuries that lead to this are:

• Bruises
• Broken bones
• Muscle strain
• Sprained ankle
• Whereas, signs of injury are:
• Trouble standing or walking
• Redness or bruising
• Pain in the area of injury

Follow the RICE method if the injury is minor, which includes:

• Rest
• Ice
• Elevation
• Compression

If the swelling doesn’t go away after that and you can’t walk, visit your doctor immediately to complete a checkup and treatment.

6. Peripheral arterial disease (PAD)

PAD is a problem with the arteries that carry blood to your legs. These arteries can become narrow or blocked due to plaque buildup, reducing blood flow.
Signs of PAD include:

• Cramping or pain when walking
• Cold or pale foot or leg
• Weak pulse in the leg
• Sores that don’t heal easily

Note: PAD can be a warning sign of heart disease. Medicines, lifestyle alterations, and sometimes surgery can help recover blood flow in the leg.

7. Other possible causes

There are a few more reasons why only the left leg got swollen:

• Tumors: This happens rarely, but a growth or elevation in your leg or pelvis can press on lymph nodes or veins, leading to swelling in one leg.
• Baker’s Cyst: A fluid-filled lump that presents behind your knee can leak fluid down your leg and maymay lead to swelling.
• Certain Medicines: Certain medications may cause fluid retention, such as

• Steroids
• Hormonal treatment
• Blood pressure mediations, for example calcium channel blockers

Note: If you currently started a new medicine and experience swelling in one leg, discuss with your doctor about it.

Why is only my left leg swelling and not the right?

There are several reasons why swelling might affect just your left leg. It could be that

• The veins or arteries in the left leg are more damaged.
• You had a past surgery or injury only on your left leg.
• A clot or blockage may only be present in the left side.

In some cases, the position you sleep or sit in could also make the left leg more prone to swelling. But if the swelling doesn’t go away or gets worse, it’s important to get it checked.

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When to see a healthcare provider

Some causes of swelling are mild, but others need fast medical care. Here’s when you should call your provider:

• If the swelling starts suddenly
• If the leg is red, hot, or painful
• If you have a fever or chills
• If you put weight on your leg, you can’t walk
• If the swelling doesn’t go away after home treatment or resting
• If you have swelling along with chest pain or shortness of breath (this could mean a blood clot has traveled to your lungs)
• Early treatment can prevent serious problems and help you recover faster.

How to prevent swelling in one leg

While not all causes of swelling can be prevented, here are some tips that might help:

• Keep active: Gentle exercises and walking can help improve blood flow in the leg
• Don’t sit or stand too long: Move around every hour.
• Elevate your legs: Put your feet up when you rest.
• Wear compression socks: These help stop fluid from building up.
• Drink enough water: Staying hydrated helps your body balance fluids.
• Avoid salty food: Too much salt can cause water retention.
• Check your skin: Keep an eye out for cuts, infections, or bruises.

Conclusion

Swelling in one leg is a common issue that can have many different causes—from a simple bruise to something more serious like a blood clot.

While it might not always be a big problem, it’s still important to pay attention to your body. Don’t ignore swelling that doesn’t go away or comes with other symptoms. See your provider to find out what’s going on and get the appropriate treatment.

Taking care of your health early can help you avoid bigger problems later. So, if only your left leg is swelling, don’t wait—listen to your body and get help when needed.