Melanoma is an aggressive form of cancer that can be life-threatening. It typically affects the skin, but it can also occur in the mouth, eyes, or under the nails. Everyone has a few moles, brown spots, and birthmarks, but people with more than 100 moles are at a greater risk of developing melanoma. The first signs often appear in atypical moles and develop slowly over time.
Melanoma often starts with a change to healthy skin, such as a darker spot or an abnormal new mole. Normal moles are round and symmetrical. Moles that are not symmetrical are one of the first warning signs of melanoma. People prone to moles and other spots should regularly check their skin for new or strange-looking spots.
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