Osler's node
（重定向自Osler node）
![Osler's lesions found on the hand and fingers of a 43-year-old male with subacute bacterial endocarditis.](/Images/godic/202501/31/Osler_Nodules_Hand0217.jpg")
Osler's nodes are painful, red, raised lesions found on the hands and feet. They are associated with a number of conditions, including infective endocarditis, and are caused by immune complex deposition. They are named after Sir William Osler who described them in the early 20th century. Their presence is one definition of Osler's sign.