Read below about swelling in one lower leg, including causes and common questions. Or get a personalized analysis of your swelling in one lower leg from our A.I. health assistant. At Buoy, we build tools that help you know what’s wrong right now and how to get the right care.

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5 Potential Swelling in One Lower Leg Causes

Disclaimer: The article does not replace an evaluation by a physician. Information on this page is provided as an information resource only, and is not to be used or relied on for any diagnostic or treatment purposes.

  1. 1.Deep Vein Thrombosis

    Deep vein thrombosis (DVT) is a blood clot that forms in a vein deep in the body. Most deep vein clots occur in the lower leg or thigh.

    Curable with medication or surgery but may recur.

    Rarity:
    Uncommon
    Top Symptoms:
    fever, thigh pain, upper leg swelling, calf pain, butt pain
    Urgency:
    Hospital emergency room
  2. 2.Fibular Stress Fracture

    The fibula is the smaller shin bone which lies on the outer part of the lower leg. With excessive, repeated stress, a small fracture (called a stress fracture) can occur.

    4-12 weeks with rest

    Rarity:
    Rare
    Top Symptoms:
    foot numbness, pain in the outside of the knee, lower leg numbness, shin pain, pain in one shin
    Symptoms that always occur with fibular stress fracture:
    pain in the outside of the shin, pain in one shin
    Symptoms that never occur with fibular stress fracture:
    pain in both feet, pain in one foot, pain in the inside of the shin, swelling in both shins
    Urgency:
    Primary care doctor

    Swelling in One Lower Leg Checker

    Take a quiz to find out why you’re having swelling in one lower leg.

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  3. 3.Supraventricular Tachycardia

    Supraventricular tachycardia (SVT) is a form of arrhythmia that causes the heart to beat too quickly and begins in the heart's upper chambers. The most common symptoms include a racing heart, lightheadedness and palpitations.

    Many people don't require treatment; however, it is considered if the episodes are long or frequent.

    Rarity:
    Rare
    Top Symptoms:
    fatigue, shortness of breath, racing heart beat, lightheadedness, deep chest pain, behind the breast bone
    Symptoms that always occur with supraventricular tachycardia:
    abnormally high heartrate
    Urgency:
    In-person visit
  4. 4.Mononucleosis Infection

    EBV Mononucleosis is a clinical syndrome characterized by fever, sore throat, and swollen lymph nodes.

    2-3 weeks

    Rarity:
    Common
    Top Symptoms:
    fatigue, headache, loss of appetite, abdominal pain (stomach ache), cough
    Urgency:
    Primary care doctor
  5. 5.Shin Bruise

    A bruise is the damage of the blood vessels that return blood to the heart (the capillaries and veins), which causes pooling of the blood. This explains the blue/purple color of most bruises. Bruises of the shin are common given the location of the shin.

    Bruises will begin to heal over the course of a week

    Rarity:
    Uncommon
    Top Symptoms:
    shin injury, shin pain from an injury, pain in one shin, shin swelling, shin bruise
    Symptoms that always occur with shin bruise:
    shin injury, shin pain from an injury
    Urgency:
    Self-treatment

Questions Your Doctor May Ask About Swelling in One Lower Leg

  • Q.Have you ever been diagnosed with diabetes?
  • Q.Are you having any difficulty walking?
  • Q.Which of the following describes your physical fitness:
  • Q.Have you been feeling more tired than usual, lethargic or fatigued despite sleeping a normal amount?

If you've answered yes to one or more of these questions, try our swelling in one lower leg symptom checker to find out more.

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Swelling in One Lower Leg Symptom Checker Statistics

  • People who have experienced swelling in one lower leg have also experienced:

    • 18% Shin Pain
    • 7% Pain in One Shin
    • 6% Moderate Shin Pain
  • People who have experienced swelling in one lower leg had symptoms persist for:

    • 29% Over a Month
    • 28% Less Than a Week
    • 22% Less Than a Day
  • People who have experienced swelling in one lower leg were most often matched with:

    • 18% Deep Vein Thrombosis
    • 2% Fibular Stress Fracture
  • Source: Aggregated and anonymized results from visits to the Buoy AI health assistant (check it out by clicking on “Take Quiz”).

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Take a quiz to find out why you’re having swelling in one lower leg

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