Read below about weakness in one upper leg, including causes and common questions. Or get a personalized analysis of your weakness in one upper 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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6 Potential Weakness in One Upper 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.Hip Dislocation

    A slipped capital femoral epiphysis is a separation of the ball of the hip joint from the thigh bone (femur) at the upper growing end (growth plate) of the bone.

    With treatment and after recovery in the hospital, no long-term effects.

    Rarity:
    Rare
    Top Symptoms:
    hip pain, moderate hip pain, dull, achy hip pain, thigh pain, groin pain
    Symptoms that always occur with hip dislocation:
    hip pain
    Urgency:
    Hospital emergency room
  2. 2.Piriformis Syndrome

    Piriformis syndrome is a condition when a muscle spanning the lower spine to the top of the thighbone presses upon the sciatic nerve, causing pain and numbness.

    1-2 months

    Rarity:
    Common
    Top Symptoms:
    pelvis pain, butt pain, pain when passing stools, leg numbness, hip pain
    Symptoms that never occur with piriformis syndrome:
    involuntary defecation, leaking urine
    Urgency:
    Primary care doctor
  3. 3.Femoral Stress Fracture

    A femoral stress fracture is a small crack in the thigh bone (femur). These fractures are most often a result of overuse and are commonly seen with an increase in activity. Stress fractures of the thigh bone are much less common than those of the shin bone (tibia), but nonetheless do occur in high-risk groups such as athletes and military recruits.

    12 weeks is the usual duration of treatment. Stress fractures usually heal on their own.

    Rarity:
    Common
    Top Symptoms:
    dull, achy hip pain, pain in one thigh, thigh pain, spontaneous hip pain
    Urgency:
    Primary care doctor

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  4. 4.Testicular Torsion

    Testicular torsion occurs when the testicle rotates which cuts off the testicle's blood supply. This causes severe pain and swelling.

    With prompt treatment, it is unlikely there will be any permanent damage. It is important to get to the hospital within 6 hours of the start of pain to make sure the testicle can be saved.

    Rarity:
    Rare
    Top Symptoms:
    testicle pain, nausea, pain in one testicle, vomiting, testicular swelling
    Symptoms that always occur with testicular torsion:
    testicle pain
    Urgency:
    Hospital emergency room
  5. 5.Hip Bone Damage (Osteonecrosis)

    Osteonecrosis of the hip is painful, progressive damage of the hip joint caused by a loss of blood flow.

    4 years

    Rarity:
    Rare
    Top Symptoms:
    severe or worsening pain in the hip or groin area, thigh pain, deep, throbbing hip pain, limping, pain in one knee
    Symptoms that always occur with hip bone damage (osteonecrosis):
    severe or worsening pain in the hip or groin area
    Urgency:
    Hospital emergency room
  6. 6.Epididymitis

    Epididymitis is swelling (inflammation) of the epididymis, a tube that sits on top of the testicle and is involved in making sperm. Most cases of inflammation are due to an infection.

    Pain eases in a few days, swelling may take up to a week to go down.

    Rarity:
    Common
    Top Symptoms:
    nausea, fever, chills, pain in one testicle, vomiting
    Urgency:
    In-person visit

Questions Your Doctor May Ask About Weakness in One Upper Leg

  • Q.Which of the following describes your physical fitness:
  • Q.Do your symptoms get worse when you exercise?
  • Q.Any fever today or during the last week?
  • Q.What is your body mass?

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

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Weakness in One Upper Leg Symptom Checker Statistics

  • People who have experienced weakness in one upper leg have also experienced:

    • 8% Lower Back Pain
    • 7% Pain in One Thigh
    • 4% Thigh Pain
  • People who have experienced weakness in one upper leg had symptoms persist for:

    • 43% Over a Month
    • 19% Less Than a Day
    • 18% Less Than a Week
  • People who have experienced weakness in one upper leg were most often matched with:

    • 9% Femoral Stress Fracture
    • 3% Piriformis Syndrome
    • 2% Hip Dislocation
  • 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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