Can your hives get worse if you are pregnant?

Yes: Hives are due to dilated blood vessels in the outer layers of the skin. In pregnancy, blood volume increases, as does the flow of blood to the skin (hence the "pregnancy glow"). Therefore, hives can worsen....

Hives in pregnancy: Hives on some people could get worse during pregnancy. However, if you feel that the itching is getting worse and irritating, then please do not hesitate and seek medical attention since it could also appear similar to other skin conditions.