Symptoms. Pulmonary edema can be acute or chronic. Acute pulmonary edema comes on quickly and requires immediate medical attention. Symptoms may include sudden trouble breathing, shortness of breath, wheezing or gasping for air, a blue or gray cast to the skin, feeling lightheaded or dizzy, sweating and coughing up sputum that is pink or frothy. Chronic pulmonary edema develops slowly over time. Symptoms may include feeling tired, rapidly gaining weight, increased breathing problems when performing physical activities, wheezing, swelling in the legs and feet, difficulty breathing when lying down and waking up at night feeling breathless.