yī shēng / jiàn yì / xiān / guān chá / zhè ge / hēi bān / de / yán sè / hé / biān yuán / yǒu méi yǒu / biàn huà

医生建议先观察这个黑斑的颜色和边缘有没有变化。

The doctor recommended first observing whether the color and edges of this dark spot change.