Published on: 6/18/2025
What could left arm swelling indicate?
Swelling in the left arm may indicate injury, infection, blood clots, lymphatic blockage, or other medical conditions and should be evaluated if sudden or persistent.
Explanation
Left arm swelling can result from several causes, including:
Injury or trauma: Sprains, strains, or fractures can cause swelling and pain. Infections: Skin infections like cellulitis can cause swelling, redness, and warmth. Blood clots (deep vein thrombosis): Clots in veins of the arm may block blood flow, causing swelling. Lymphedema: Blockage or damage to lymphatic vessels, often after surgery or radiation, can cause fluid buildup. Venous insufficiency or obstruction: Poor circulation or vein blockage can lead to swelling. Allergic reactions: Bites, stings, or allergen exposure can cause localized swelling. Systemic conditions: Heart, kidney, or liver diseases can lead to fluid retention, sometimes affecting one arm.
Sudden, painful, or persistent swelling should prompt medical evaluation to determine the cause and appropriate treatment.
(References)
- Ciocon JO, & Galindo-Ciocon D. (1998). Arm edema, subclavian thrombosis, and pacemakers. Angiology, 9555935.
- Minchu P, Messner M, Albuquerque F, Newton D, Larson R, & Levy M. (2024). Outcomes following interval delayed first rib resection for .... Journal of vascular surgery. Venous and lymphatic disorders, 38631801.
- Franco IF, Gurrado A, Lissidini G, Di Meo G, Pasculli A, & Testini M. (2015). Floating left innominate vein neoplastic thrombus: a rare .... Phlebology, 24335091.
Tell your friends about us.
We would love to help them too.
For First Time Users
What is Ubie’s Doctor’s Note?
We provide a database of explanations from real doctors on a range of medical topics. Get started by exploring our library of questions and topics you want to learn more about.
Learn more about symptoms
Was this page helpful?
Purpose and positioning of servicesUbie Doctor's Note is a service for informational purposes. The provision of information by physicians, medical professionals, etc. is not a medical treatment. If medical treatment is required, please consult your doctor or medical institution. We strive to provide reliable and accurate information, but we do not guarantee the completeness of the content. If you find any errors in the information, please contact us.