高血红蛋白计数表明红细胞中含铁蛋白质的水平高于正常水平。血红蛋白（通常缩写为 Hb 或 Hgb）是红细胞的携氧成分。
血红蛋白赋予红细胞颜色，帮助将氧气从肺部输送到身体其余部分，并将二氧化碳输回肺部呼出。
高血红蛋白计数阈值因医疗实践而略有差异。该阈值一般定义为男性每分升（dL）血液中血红蛋白含量超过 16.6 克（g），而女性血红蛋白阈值为超过 15 g/dL。在儿童中，高血红蛋白计数的定义随年龄和性别而变动。血红蛋白计数也可能因一天的不同时间、身体水分状况和海拔而变动。
通常是在医生为诊断另一种医疗状况而安排的检查中检出血红蛋白计数高。医生可能安排其他检查，辅助确定血红蛋白计数高的原因。
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Original article: https://www.mayoclinic.org/zh-hans/symptoms/high-hemoglobin-count/basics/causes/sym-20050862