Read below about weakness in one forearm, including causes and common questions. Or get a personalized analysis of your weakness in one forearm 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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3 Potential Weakness in One Forearm 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.Rotator Cuff Tendonitis

    Impingement syndrome is a common shoulder condition seen in aging adults. The tendons of rotator cuff muscles, whose action is to rotate the arm such such as during a tennis swing, pass in a narrow space between two bones in the shoulder. When the space becomes too narrow, which can happen as a result of an overuse injury, pain may develop as the tendons rub against the bones.

    Impingement may take weeks to months to settle.

    Rarity:
    Common
    Top Symptoms:
    pain in one shoulder, dull, achy shoulder pain, shoulder pain that gets worse at night, difficulty moving the shoulder, shoulder pain from overuse
    Symptoms that always occur with rotator cuff tendonitis:
    pain in one shoulder
    Urgency:
    Primary care doctor

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  2. 2.Tennis Elbow (Lateral Epicondylitis)

    Lateral epicondylitis (tennis elbow) is soreness or pain on the outside of the upper arm near the elbow.

    2-3 weeks and up to 12 months

    Rarity:
    Common
    Top Symptoms:
    elbow pain, pain in one elbow, hand weakness, pain in the thumb side of the elbow, elbow pain from overuse
    Symptoms that always occur with tennis elbow (lateral epicondylitis):
    elbow pain
    Urgency:
    Self-treatment
  3. 3.Ulnar Nerve Entrapment of Elbow

    Ulnar Nerve Entrapment of Elbow is the compression of the ulnar nerve, causing numbness and/or weakness in the hands.

    Mild symptoms resolve on their own, severe disease resolves with surgery

    Rarity:
    Common
    Top Symptoms:
    hand weakness, weakness in one hand, numbness in one hand, pain in one elbow, pain in one forearm
    Urgency:
    Primary care doctor

Questions Your Doctor May Ask About Weakness in One Forearm

  • Q.About your [forearm], do you notice:
  • Q.Do you work with your hands for a lot of the day? (e.g. at a computer, doing manual tasks, etc.)
  • Q.How would you explain your forearm pain?
  • Q.Have someone feel for your pulse (at the wrist) on the side of your body that hurts. Now, turn your head to that side. Does the pulse go away? (This is known as the Adson's test.)

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

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Weakness in One Forearm Symptom Checker Statistics

  • People who have experienced weakness in one forearm have also experienced:

    • 9% Pain in One Shoulder
    • 7% Pain in One Forearm
    • 6% Pain in One Arm
  • People who have experienced weakness in one forearm had symptoms persist for:

    • 40% Over a Month
    • 23% Less Than a Day
    • 17% Less Than a Week
  • People who have experienced weakness in one forearm were most often matched with:

    • 16% Ulnar Nerve Entrapment of Elbow
    • 6% Rotator Cuff Tendonitis
    • 5% Tennis Elbow (Lateral Epicondylitis)
  • 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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