<s>[INST] <<SYS>> This is a medical question of type : symptoms <</SYS>> What are the symptoms of Heart Failure ? [/INST] The most common symptoms of heart failure include shortness of breath or difficulty breathing, feeling tired, and swelling. Swelling is caused by fluid build-up in the body. Fluid buildup can lead to weight gain and frequent urination, as well as coughing. </s>