- A spread of pigmentation beyond the border, such as dark coloring that spreads past the edge of a mole or mark
- Changes of the skin, especially size, colour,spot or a new growth
- Bleeding, scaliness,oozing of the bump
- Feeling of itchiness, tenderness, or pain
- Unprotected or excessive exposure to ultraviolet radiation
- Occupational exposure to coal tar,pitch,creosote,arsenic compounds,or radium
- Family history of skin cancer
- Multiple or unusual moles
- Severe sunburns in the past
- The use of many immunosuppressive drugs
- Chronic non healing wounds
- Avoid direct exposure to the sun between 10am- 4pm.
- Cover up with protective clothes to protect skin from the direct sunlight exposure
- Apply sunscreen with sun protection factor (SPF) 30 by 30 minutes before outdoor activities.
- Undergo regular checkups and bringing changing lesions to the attention of doctor.
- Increase the consumption of carrot,orange,tomatoes, red peppers, spinach and kale which rich in antioxidant to lower the risk of skin cancer.