The symptoms of hypertension during pregnancy vary depending on the blood pressure level, individual tolerance, and other factors. Common symptoms include high blood pressure, protein in the urine, and generalized edema. Edema can vary in severity; it can start with bilateral ankle swelling, progress to the calves, thighs, and then become generalized throughout the body. Increased blood pressure can also lead to headaches, dizziness, nausea, and blurred vision. In more severe cases, pain in the upper abdomen and convulsions may occur.