What amount sun exposure causes melanoma?

Melanoma: There is no specific amount of sun exposure that is considered totally safe. A single exposure could theoretically cause a melanoma. For any individual, however, there are many factors at play which will make an exposure more or less likely to start changes the result in melanoma. However, the more sun exposure there is, the higher the probability of developing a melanoma.

We don't know the: answer to that. Some melanoma is related to family history so you are at greater risk but some is sun induced. i say avoid sunbathing, avoid sunburns and wear sunscreen and avoid high sun UV exposure hours 10-4. hats and protective clothing is important.

Depends On Skin Type: Melanoma is the deadliest of all skin cancers. Your risk of melanoma with sun exposure depends on your skin type. Skin that burns easily and never tans has a higher risk of developing melanoma than skin that is dark and almost never burns. As a rule, you should always wear sunscreen when exposed to the sun. Not only will that decrease your risk of melanoma, it also prevents premature aging.