Monitor your moles for any alterations in size. These changes can vary and so there is no singular description of how skin cancer appears.
If you notice a sore that doesn't heal within a few weeks, it could be a sign of skin cancer. These growths may appear shiny and may bleed.
Skin cancer can cause changes in skin pigmentation, such as darkening or lightening of the skin. Pay attention to any spots that look different.
Skin cancer can sometimes cause itching and pain. If you experience persistent discomfort, it's worth getting it checked.
Another potential sign is the spread of colour beyond the border of a mole. This might include the appearance of redness or inflammation around the spot.