Upper arm: Measure around the largest part of each arm above the elbow.

上臂：测量手肘以上每条手臂最粗的地方。

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This nerve travels from your neck down your upper arm, wrapping around the elbow joint on its way to the hand.

这条神经从你的颈部开始下伸到你的上臂，在运行到你的手的过程中围绕过你的肘关节。

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When you work at a computer, the keyboard should be at elbow height, so your upper and lower arms form an Angle of 90 degrees or more and your forearms are supported by armrests.

当你在电脑前工作时，键盘应该和肘部齐高，这样你的大臂与小臂成90度角或更大的角度，小臂可以放在椅子扶手上。

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Though the patches can occur anywhere, they most often appear on the hands and feet, in the front of the bend of the elbow, behind the knees, and on the ankles, wrists, face, neck and upper chest.

CNN: Atopic dermatitis (eczema)