Leg pain isn’t always a cause for concern. It can result from everyday activities like exercise, long hours on your feet, or simple muscle fatigue. However, in some cases, it may signal something more serious, such as a deep vein thrombosis (DVT).

A DVT is a blood clot that forms in a deep vein, typically in the leg, and requires prompt medical attention. If left untreated, the clot can travel to the lungs and cause a pulmonary embolism (PE), which can be life-threatening.

One of the key warning signs of DVT is a noticeable change in how one leg feels compared to the other. Symptoms such as increased swelling, warmth, or tenderness that persist or worsen over time should not be ignored.

Common DVT Symptoms in the Leg

DVT symptoms in the legs may be mild or obvious. 

The most common symptoms are:

• Swelling in one of your legs (rarely both)
• Pain or tenderness in the affected area, which may be cramp-like in nature, especially in the calf area
• Warmth in the affected area, which may also be accompanied by discoloration
• A feeling of tightness or cramping in the leg
• Leg swelling that may be obvious, especially if one leg looks larger than the other

Less common symptoms are:

• Visible surface veins becoming more prominent
• Skin that feels firm or hard to the touch
• Mild fever

The location of the clot may also determine the symptoms. A clot in the calf may cause a charley horse that doesn’t go away. A clot in the thigh or pelvis may cause swelling in the affected area.

Signs of a Pulmonary Embolism (PE): Get Emergency Help

A PE can be your first sign, even if your leg never hurts or becomes swollen. If you notice any of these signs, call 911 right away:

• Trouble breathing or not being able to catch your breath
• Chest pain that is sharp and gets worse with deep breathing
• If you start coughing up blood
• Fainting or feeling dizzy, or near fainting

DVT Symptoms vs. Common Look-Alikes

DVT is not the only condition that causes pain and swelling in one’s leg. Common look-alikes include:

• Muscle strain or a normal cramp, which usually subsides with time and rest
• Cellulitis, which is usually accompanied by fever and is characterized by spreading redness and heat
• Baker’s cyst, which is usually characterized by swelling in the calf and behind the knee
• Superficial thrombophlebitis, which is usually a tender, cord-like surface vein

The aim is not to self-diagnose this condition perfectly. It is worth getting checked if one is experiencing a new and one-sided condition.

Why DVT Happens: Risk Factors That Matter

DVT occurs when the blood flow is reduced, or the body is more likely to develop clots. The large risk factors are:

• Surgery/Hospitalization within the past month
• Long Traveling/Sitting for long times
• Pregnancy/Post-Pregnancy
• Estrogen-Containing Medications
• Cancer/Cancer Treatment
• Previous DVT/PE or Family History

There are some daily life stacking risks that occur in Connecticut, too. For example, long car rides on I-95, Route 8, Merritt Parkway, long days at work, and travel days with long hours of sitting.

While having one of these is not a guarantee of a blood clot, having these plus other symptoms should lower your caution level.

What to Do If You Suspect a Deep Vein Thrombosis

If you are experiencing new leg swelling and pain, it is not recommended that you wait it out. First, if your symptoms include difficulty breathing, chest pain, fainting, or coughing up blood, you should immediately call 911.

If your symptoms are only in your leg, you should immediately contact your clinician the same day or go to a facility that can coordinate imaging in a timely fashion. Evaluation of DVT consists of a duplex ultrasound, as well as sometimes a blood test for D-dimer in less likely situations.

Same-Day DVT Ultrasound in Connecticut

If you need urgent imaging, Vein Institute offers same-day access for DVT ultrasound at our Connecticut clinics:

• Milford: 51 Roses Mill Rd, Milford, CT 06460
• Shelton: 110 Commerce Drive, Shelton, CT 06484
• Fairfield: 2193 Black Rock Turnpike, Fairfield, CT 06825
• Newtown: 33 Church Hill Road, Newtown, CT 06470

Call (203) 426-5554.

DVT Prevention Tips That Actually Help

You can’t always prevent clots from forming, but here are a few tips to keep in mind on travel days or when you’re stuck in a chair.

Try to stand up and walk around at least once an hour. If you can’t manage that, pump your ankles and calf muscles a few times an hour. It’s also important to stay hydrated with water, particularly when you’re on the go.

If you’re at increased risk for clots, check with your healthcare provider to see if compression socks are a good idea for you. If you’ve had a clot in the past, it’s a good idea to check in with your healthcare provider before any big trips or surgeries so you know what to do in your case.

Key Takeaways for CT Residents

If one leg suddenly becomes more swollen, more tender, warmer, or redder than the other, it’s worth getting checked the same day. And if you develop shortness of breath, chest pain, fainting, or coughing up blood, treat it as an emergency and call 911.

If you are in need of immediate imaging, contact us today to schedule a same-day DVT ultrasound.

FAQs About Deep Vein Thrombosis Symptoms

What Are the First Signs of a Blood Clot?

Most often: new one-sided swelling, calf pain/tenderness (cramp-like), warmth, and redness/discoloration. For a clot in the lungs: sudden shortness of breath or chest pain (call 911).

Should you walk if you have a DVT?

If you suspect a DVT, get checked the same day. Once diagnosed and on treatment, light walking is usually okay, but follow your clinician’s instructions.

Can a DVT feel like a leg cramp?

Yes. The pain associated with DVT is sometimes referred to as a cramp or “charley horse,” especially in the calf. The problem is that sometimes this pain does not go away, especially when accompanied by new leg swelling, warmth, and tenderness on one side. If one leg is significantly larger than the other or if pain is worsening over time, seek evaluation on the same day.

Can a PE occur without leg symptoms?

Yes. Not all people feel symptoms of DVT, and sometimes a blood clot may be located higher up in the leg or pelvis, so symptoms may not be as obvious. Sometimes, a PE is the first obvious symptom. Sudden breathlessness, chest pain, fainting, or coughing up blood is always a medical emergency.

If my ultrasound comes back negative, am I in the clear?

The answer is often yes. If your symptoms are getting better and your ultrasound is negative, that is a great sign. However, if your pain and swelling are not getting better, and your doctor is still concerned based on your risk factors, there are other options. What happens next depends on your symptoms and risk factors.