Stretch Marks

(Striae)

Definition

Stretch marks are red, whitish, or purple streaks in the skin.

Causes

Stretch marks occur when skin is stretched too much over time. The elastic fibers just below the skin tear. This tear leaves streaks of indented skin. The elastic fibers are also weakened by hormones present during pregnancy. These hormones may also be associated with rapid weight gain, or certain medical conditions.
Pregnant Woman
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Stretch marks are common in pregnancy.
Copyright © Nucleus Medical Media, Inc.

Risk Factors

Stretch marks are more common in women. Other factors that may increase your chance of stretch marks include:
  • Family history of stretch marks
  • Pregnancy, especially if the baby is large
  • Being overweight or obese
  • Rapidly gaining or losing weight
  • Rapid muscle gain
  • Using corticosteroid medicines
  • Certain medical conditions, such as adrenal gland disorders

Symptoms

Stretch marks are red or purple streaks that are slightly indented. They eventually turn whitish in color. They are most common on the stomach, thighs, buttocks, and breasts, but may also occur in other areas. The stretched skin may also be dry or itchy.

Diagnosis

Your doctor will ask about your symptoms and medical history. A physical exam will be done.If the cause of stretch marks is not obvious your doctor may look for other causes. These tests may include:
  • Blood tests for cortisol levels

Treatment

Most stretch marks fade over time without treatment. Some people may want faster results or deeper fading of stretch marks. In general, the current treatments are limited and do not work well.Talk with your doctor about the best treatment plan for you. Factors that will affect your treatment options include:
  • Age of stretch marks
  • Convenience of treatment—may require multiple sessions
  • Cost—usually not covered by medical insurance
  • Your expectations
Treatment options include the following:

Medications

Tretinoin cream may help to lessen the appearance of stretch marks. It is most effective on stretch marks that are less than 6 weeks old and still red or pink in color.It should not be used during pregnancy.

Laser Therapy

Laser therapy can stimulate the growth of collagen and elastin. It may decrease the appearance of stretch marks.

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