What is the pigmentation of the face during pregnancy called?

NHM UP Staff Nurse - 2019

Obstetrics & Gynaecology

Easy

Appeared in: NHM UP Staff Nurse - 2019

Explanation

Chloasma, also known as melasma or the 'mask of pregnancy,' is the correct medical term for the blotchy hyperpigmentation that appears on the face during pregnancy.
It manifests as irregular, brownish patches, typically on the forehead, cheeks, nose, and chin, as seen in the provided image.
The condition is caused by hormonal changes, specifically increased levels of estrogen, progesterone, and melanocyte-stimulating hormone (MSH), which stimulate melanocytes to produce more melanin pigment.
While common in pregnancy, it can also be caused by oral contraceptives.

Option A: Melanin is the pigment that causes the color change, but it is not the name of the clinical condition itself. Chloasma is the condition characterized by the overproduction of melanin in specific facial areas.
Option B: Linea alba refers to the pale, fibrous band running down the midline of the abdomen before it darkens during pregnancy. It is not related to facial pigmentation.
Option C: Linea nigra is the dark vertical line that appears on the abdomen during pregnancy, not on the face. It is the result of the linea alba darkening due to hormonal changes.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Physiological Skin Changes During Pregnancy as background academic context rather than a clinical decision trigger.
Nurses play a crucial role in educating and reassuring patients about common physiological changes in pregnancy, such as chloasma. It is important to explain that it is benign and usually resolves postpartum.
A key nursing intervention is advising patients on sun protection. Exposure to UV light can significantly worsen chloasma, so recommending daily use of broad-spectrum sunscreen (SPF 30+) and protective clothing is essential.
What if? If a patient develops similar facial pigmentation when not pregnant or taking oral contraceptives, it could be a sign of an underlying medical condition, such as an endocrine disorder (e.g., Addison's disease), and would warrant referral for further medical evaluation.

How to Approach the Question

First, identify the key elements of the question: a specific type of 'pigmentation,' its location on the 'face,' and the context of 'pregnancy.'
Next, recall the common physiological skin changes that occur during pregnancy.
Evaluate each option. 'Melanin' is the pigment, not the condition. 'Linea alba' and 'linea nigra' are related to the abdomen, not the face.
This process of elimination leaves 'Chloasma,' which is the specific term for facial hyperpigmentation during pregnancy.
Confirm the definition of Chloasma (also known as melasma or 'mask of pregnancy') to ensure it matches the description in the question.

Concept Tested & Keywords

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E6 Obstetrics Williams p. 40-59

E6 Medicine Harrison 22e Part 1 p. 440-442