Read below about swelling of one thigh, including causes and common questions. Or get a personalized analysis of your swelling of one thigh 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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A.I. Health Assistant Causes for Swelling of One Thigh

The list below shows results from the use of our A.I. Health Assistant by Buoy users who experienced swelling of one thigh. This list does not constitute medical advice.

  1. 1.Compartment Syndrome

    Compartment syndrome is a serious condition that involves increased pressure in a muscle compartment. It can lead to muscle and nerve damage and problems with blood flow.

    Prognosis is highly variable after surgery and depends on how rapidly you are treated.

    Rarity:
    Rare
    Top Symptoms:
    arm numbness, hand numbness, foot numbness, pain in one leg, thigh numbness
    Urgency:
    Hospital emergency room
  2. 2.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
  3. 3.Hamstring Strain

    A strain, commonly called a "pulled muscle," is when a muscle becomes overstretched and tears. A hamstring strain happens when one of the muscles on the back of the upper leg (thigh) is pulled.

    Most low grade strains should recover within 1 week.

    Rarity:
    Uncommon
    Top Symptoms:
    spontaneous back pain, pain in the back of the knee, hamstring tightness, sports injury, hamstring pain
    Symptoms that always occur with hamstring strain:
    hamstring pain
    Symptoms that never occur with hamstring strain:
    groin pain, hip pain, pain in the outside of the hip, difficulty moving the hip
    Urgency:
    Self-treatment
  4. 4.Thigh 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 will begin to heal over the course of a week

    Rarity:
    Rare
    Top Symptoms:
    pain in one thigh, thigh pain from an injury, upper leg injury, thigh bruise, swelling of one thigh
    Symptoms that always occur with thigh bruise:
    upper leg injury, thigh pain from an injury
    Urgency:
    Self-treatment

    Swelling of One Thigh Checker

    Take a quiz to find out why you’re having swelling of one thigh.

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  5. 5.Cellulitis

    Facial cellulitis is a skin infection that typically comes from other parts of the face like the mouth or the sinuses and needs antibiotic treatment. Symptoms can be pain, redness, warmth and swelling of the affected area.

    Dependent on severity of infection

    Rarity:
    Uncommon
    Top Symptoms:
    fever, chills, facial redness, swollen face, face pain
    Symptoms that always occur with cellulitis:
    facial redness, area of skin redness
    Urgency:
    Primary care doctor
  6. 6.Osteogenic Sarcoma

    Osteogenic sarcoma (osteosarcoma) is a cancer that starts in the bone, and usually affects the ends of the bone where new tissue forms at a growth plate. It is the most common cancerous bone tumor in young people, with the average age at diagnosis being 15 years. Pain in the bone is the most commonly reported symptom.

    Although surgery will treat the cancer, a limb prosthesis will likely need to be used for life.

    Rarity:
    Ultra rare
    Top Symptoms:
    spontaneous bone pain, lower leg bump, upper leg bump, swollen thigh, swollen shin
    Symptoms that always occur with osteogenic sarcoma:
    spontaneous bone pain
    Urgency:
    Primary care doctor
  7. 7.Allergic Contact Dermatitis of the Thigh

    Allergic contact dermatitis is a condition in which the skin becomes irritated and inflamed following physical contact with an allergen. Common products known to cause allergic dermatitis include plants, metals, soap, fragrance, and cosmetics.

    1-2 days

    Rarity:
    Common
    Top Symptoms:
    upper leg itch, upper leg redness, scabbed area of the upper leg
    Symptoms that always occur with allergic contact dermatitis of the thigh:
    upper leg redness
    Urgency:
    Self-treatment
  8. 8.Benign Bony Growth (Osteochondroma)

    An osteochondroma is a non-cancerous growth that usually develops during childhood or adolescence. It is a benign tumor that forms on the surface of a bone near the growth plate.

    Will remain for life if not treated with surgery, but is benign and is not expected to affect life expectancy.

    Rarity:
    Ultra rare
    Top Symptoms:
    lower leg bump, upper leg bump, numbness in one thigh, painful thigh lump, hip bump
    Urgency:
    Primary care doctor

Questions Your Doctor May Ask About Swelling of One Thigh

  • Q.Do you have a rash?
  • Q.Any fever today or during the last week?
  • Q.Have you ever been diagnosed with diabetes?
  • 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 of one thigh symptom checker to find out more.

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Swelling of One Thigh Symptom Checker Statistics

  • People who have experienced swelling of one thigh have also experienced:

    • 13% Pain in One Thigh
    • 6% Thigh Pain
    • 3% Hip Pain
  • People who have experienced swelling of one thigh had symptoms persist for:

    • 30% Less Than a Week
    • 28% Over a Month
    • 22% Less Than a Day
  • People who have experienced swelling of one thigh were most often matched with:

    • 46% Compartment Syndrome
    • 46% Deep Vein Thrombosis
    • 7% Hamstring Strain
  • 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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