What sign should a pregnant client diagnosed with mild preeclampsia report to the health care provider?

In the context of mild preeclampsia, it is crucial for the pregnant client to monitor changes in their condition closely. A significant symptom that warrants immediate attention is a headache lasting more than 24 hours. This is because persistent headaches can be indicative of increased blood pressure or worsening of the condition, as preeclampsia can lead to more severe complications such as eclampsia or other neurological issues.

The other signs listed, such as weight gain of more than 1 pound in a week and swelling in hands and feet, can occur in many normal pregnancies as well and are not as urgent. While excessive swelling and rapid weight gain could lead to more serious conditions like edema, they do not represent an immediate concern like a prolonged headache can. Persistent nausea might also be present due to various reasons related to pregnancy, but it is not a hallmark sign of worsening preeclampsia.

In conclusion, the appropriate sign for a pregnant client diagnosed with mild preeclampsia to report is a headache lasting more than 24 hours, as this could indicate a significant change in her health status.