When board-certified dermatologistDr.

Elizabeth Tanziwas pregnant with her first child, a dark spot formed on her lower leg.

Six months later, when the spot began to grow, the alarm bells started ringing.

Gloved hands inspect a mole on a person's skin

1. you could get skin cancer underneath your nails.

Just one session of indoor tanning can increase the risk of melanoma.

Skin cancer in between the toes is particularly dangerous.

Woman in a black swimsuit applies sunscreen on her shoulder by a pool. The image promotes sun safety and self-care in a poolside setting

Sores or cuts that dont heal could be a sign of skin cancer.

Not all melanomas follow the ABCDE rules.

Skin cancer can be mistaken for eczema or psoriasis.

A close-up image of a person's well-groomed hands with neatly trimmed and manicured nails placed against a plain background

Skin cancer can occur in all skin tones.

This article originally appeared onHuffPost.

Person laying in tanning bed with protective eyewear, illuminated by UV lights

A person applies cream to their toes while seated on a bed

A close-up of a hand with a bandage on the palm, against a plain background

A person lies face down on a medical examination table while a healthcare professional inspects their back with a dermatoscope

A dermatologist examines a woman's skin with a dermatoscope while the woman lies back and smiles

Two women on a boat, one with short hair and sunglasses, smiling, while the other, with braided hair and sunglasses, applies sunscreen on her back