The most common causes of skin cancer are from ultraviolet radiation from the sun and tanning beds. Some tips can be used in prevention of skin cancer.

1. Sun bathers should dry off after swimming. Water tends to act like a magnifying glass which produces more heat absorbing into the skin. It can cause severe sunburn and they can develop blisters and even permanent skin damage. 

2. Individuals who fall asleep are more likely to lose track of the many hours they spend in the sun. It can be easy to fall asleep when it's so warm, but it's not a wise decision. Most of those who do fall asleep tend to wake up with a sore body due to sunburn.

3. Anyone who is planning on spending the day at the beach should lather up on sunscreen. Along with using skin protection, it is a good idea to decrease on indoor tanning and mid-day sun exposure. Though sunscreen protects against most types of cancer, the one it doesn't protect against is melanoma, which is the most deadliest of malignant cancers. So, it should also be a habit to wear protective clothing when out during mid-day hours to keep the sun off of the skin as much as possible.

Basal cell carcinoma, squamous cell carcinoma, and melanoma are all malignant tumors that are named after the cells from which they originate. They can appear as ulcers, discolored skin, or changes in an existing nevus, or mole. Precautionary methods should be used on moles that are greater than 6mm in diameter, are oddly shaped, and have different color variations. Merkel cell carcinomas grow quickly, but because it does not cause an irritation such as pain or itchiness, it usually is passed off as a cyst or something minor. 

It is recommended to frequently be screening for any growths that may appear to be new or different from the last it was seen. Though there is always the possibility that it could be a non-melanoma tumor, the earlier the signs are detected, the better the treatment and the survival rate. Any patients that have been previously diagnosed with a tumor, malignant or not, should revisit a dermatology specialist if any other tumors or cysts appear. The reason being is that a tumor could always end up being one that is considered metastasis. It is always better to find out sooner than later, so that the best care is taken to prevent any life-threatening results.