Which skin change might occur during the second or third trimester of pregnancy?

During the second or third trimester of pregnancy, palmar erythema can occur as a common skin change. This condition is characterized by reddening of the palms and is linked to hormonal changes that happen in a pregnant woman's body. Increased levels of estrogen during pregnancy can cause blood vessels to become more dilated, leading to this flushing appearance on the palms.

This phenomenon is typically harmless and usually resolves after delivery. Recognizing palmar erythema as a normal change during this time can help reassure expectant mothers that their body is adapting to the physiological changes of pregnancy.

Other options listed, while they may also occur during pregnancy, do not have the same prevalent association with the second or third trimesters, making palmar erythema the most relevant and characteristic change during that specific timeframe.