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Birthmarks are coloured marks on the skin that are present at birth or soon afterwards. Most are harmless and disappear without treatment, but some may need to be treated.

There are many different types of birthmark.

Flat, red or pink areas of skin (salmon patches or stork marks)

Salmon patches:

• are red or pink patches, often on a baby's eyelids, head or neck
• are very common
• look red or pink on white, brown and black skin
• are easier to see when a baby cries
• usually fade by the age of 2 when on the forehead or eyelids
• can take longer to fade when on the back of the head or neck

Strawberry marks:

• are blood vessels that form a raised red lump on the skin
• appear soon after birth
• usually look red on white, brown and black skin
• are more common in girls, premature babies (born before 37 weeks), low birthweight babies, and multiple births, such as twins
• get bigger for the first 6 to 12 months, and then shrink and disappear by the age of 7
• sometimes appear under the skin, making it look blue or purple
• may need treatment if they affect vision, breathing, or feeding

Port wine stains:

• are red, purple or dark marks and usually on the face and neck
• are present from birth
• look like very dark patches on brown or black skin
• usually affect 1 side of the body, but can affect both
• can sometimes be made lighter using laser treatment (it's most effective on young children)
• can become darker and lumpier if not treated
• can be a sign of Sturge-Weber syndrome and Klippel-Trenaunay syndrome, or macrocephaly-capillary malformation, but this is rare

Cafe-au-lait spots:

• are light or dark brown patches that can be anywhere on the body
• are common, with many children often having 1 or 2
• look darker on brown or black skin
• can be different sizes and shapes
• may be a sign of neurofibromatosis type 1 if a child has 6 or more spots

These birthmarks:

• can look blue-grey on the skin like a bruise
• are often on the lower back, bottom, arms or legs
• are there from birth
• are most common on babies with brown or black skin
• do not need treating and will usually go away by the age of 4
• are not a sign of a health condition

If your baby is born with a blue-grey spot it should be recorded on their medical record.

Congenital moles:

• are brown or black moles caused by an overgrowth of pigment cells in the skin
• look darker on brown or black skin
• can become darker, raised and hairy, particularly during puberty
• may develop into skin cancer if they're large (the risk increases the larger they are)
• do not need to be treated unless there's a risk of skin cancer

Find out about other types of birthmark

• Birthmark Support Group: types of birthmark

See a GP if:

Most birthmarks do not need treatment, but some do. This is why it's important to get a birthmark checked if you're worried about it.

A birthmark can be removed on the NHS if it's affecting a person's health. If you want a birthmark removed for cosmetic reasons, you'll have to pay to have it done privately.

Possible treatments for birthmarks include:

• medicines – to reduce blood flow to the birthmark, which can slow down its growth and make it lighter in colour
• laser therapy – where heat and light are used to make the birthmark smaller and lighter (it works best if started between 6 months and 1 year of age)
• surgery – to remove the birthmark (but it can leave scarring)

Help and support

• Birthmark Support Group: getting help