多发性肌炎是肌肉的非感染性炎性疾病,其中有皮疹者被称为皮肌炎。可有典型和非典型皮疹,有典型皮疹时,诊断不甚困难,其表现为早期面部有蝶形或弥漫性红斑,颜色逐渐加深而呈特殊的紫红色,并常肿胀,尤其是上眼睑肿胀,有紫红色斑和毛细管扩张称为 heliotrop eyelid 或 heliotr Polymyositis is a noninfectious inflammatory disease of the muscles, of which rashes are called dermatomyositis. Typical and atypical rashes, typical rashes, the diagnosis is not difficult, the performance of early facial butterfly or diffuse erythema, the color gradually deepened and showed a special purple, and often swelling, especially the upper eyelid swelling , With fuchsia and telangiectasia called heliotropy eyelid or heliotr