Instead, physicians should try to identify those that could cause scarring or medical problems and begin immediate treatment , according to the American Academy of Pediatrics guideline.

The exact cause of most birthmarks is unknown, but they are thought to occur as a result of a localized imbalance in factors controlling the development and migration of skin cells. In addition, it is known that vascular birthmarks are not hereditary.is a congenital, benign irregularity on the skin which is present at birth or appears shortly after birth, usually in the first month. They can occur anywhere on the skin. Birthmarks are caused by overgrowth of blood vessels, melanocytes, smooth muscle, fat, fibroblasts, or keratinocytes. 

Infantile hemangiomas

Infantile hemangiomas are bright red or bruise-like birthmarks that appear shortly after a baby is born. They are caused by extra blood vessels and appear on up to 5 % of infants. "The traditional approach to infantile haemangiomas was very hands-off, since they are very difficult to handle." Dr. Ilona Frieden said in an academy news release."But for some hemangiomas, waiting until they cause problems, such as permanent scarring, skin breakdown, or medical problems," added Frieden, vice chair of the subcommittee that created the new guideline . 

These are the most common noncancerous tumors in children and are usually harmless. They may look like rubbery, bumpy red strawberry marks, or may resemble bruised swelling.However, early identification and monitoring is essential in case treatment is required to prevent medical complications or permanent disfigurement, the guideline says. It appeared online Dec. 24 in the journal Pediatrics . Hemangiomas located on certain parts of the body are more likely to become open sores, bleed, become infected and scar. Those near the eyes, nose or mouth may affect a child's ability to see, eat or breathe, according to the medical group.

 Large hemangiomas on the nose or lips can distort growth. In rare cases, hemangiomas may grow inside the body and need to be monitored with imaging tests, the doctors said. It's best to treat problematic hemangiomas by 1 month of age."The goal is to keep them from getting bigger during their period of rapid growth, or to make them more quickly," said Dr. Daniel Krowchuk, chair of the clinical practice guideline subcommittee. The recommended treatment is the beta blocker medication propranolol. Other options include oral steroids, topical medications or surgery, according to the guideline.

The exact cause of most birthmarks is unknown, but they are thought to occur as a result of a localized imbalance in factors controlling the development and migration of skin cells. In addition, it is known that vascular birthmarks are not hereditary. is a congenital, benign irregularity on the skin which is present at birth or appears shortly after birth, usually in the first month. They can occur anywhere on the skin. Birthmarks are caused by overgrowth of blood vessels, melanocytes, smooth muscle, fat, fibroblasts, or keratinocytes.

Infantile hemangiomas are bright red or bruise-like birthmarks that appear shortly after a baby is born. They are caused by extra blood vessels and appear on up to 5 percent of infants. "The traditional approach to infantile haemangiomas was very hands-off, since they are very difficult to handle." Dr. Ilona Frieden said in an academy news release. "But for some hemangiomas, waiting until they cause problems, such as permanent scarring, skin breakdown, or medical problems," added Frieden, vice chair of the subcommittee that created the new guideline . 

These are the most common noncancerous tumors in children and are usually harmless. They may look like rubbery, bumpy red strawberry marks, or may resemble bruised swelling. However, early identification and monitoring is essential in case treatment is required to prevent medical complications or permanent disfigurement, the guideline says. It appeared online Dec. 24 in the journal Pediatrics .

Hemangiomas located on certain parts of the body are more likely to become open sores, bleed, become infected and scar. Those near the eyes, nose or mouth may affect a child's ability to see, eat or breathe, according to the medical group. Large hemangiomas on the nose or lips can distort growth. In rare cases, hemangiomas may grow inside the body and need to be monitored with imaging tests, the doctors said. It's best to treat problematic hemangiomas by 1 month of age.

"The goal is to keep them from getting bigger during their period of rapid growth, or to make them more quickly," said Dr. Daniel Krowchuk, chair of the clinical practice guideline subcommittee. The recommended treatment is the beta blocker medication propranolol. Other options include oral steroids, topical medications or surgery, according to the guideline.