Causes of Left Hand Numbness
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Vasculitis
Vasculitis, which occurs when blood vessels become inflamed, is a possible cause of left hand numbness. This condition may affect one or multiple organs, and it may be a short- or long-term condition. Symptoms may include headache, aches and pains, fever and weight loss. Some forms of vasculitis may cause weakness or numbness in the hands or feet.
The cause of vasculitis isn't clear, but some triggers appear to include infections, immune system diseases and certain medications. Corticosteroids help control inflammation from vasculitis.10‘Vasculitis.’ Mayo Clinic, Mayo Foundation for Medical Education and Research, 24 Nov. 2020, www.mayoclinic.org/diseases-conditions/vasculitis/symptoms-causes/syc-20363435
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