Certain heart conditions can cause swelling, but swelling is not always caused by a heart condition. There are many causes of edema. Edema is known medically as water retention. Edema is a swelling of the body’s tissues due to the accumulation of excess fluid in the tissue spaces. Edema can be categorized as generalized or limited. There are many causes of edema. The causes of generalized edema are: cardiac disease, renal disease, liver disease, thyroid disease, primary aldosteronism, Cushing’s syndrome, malnutrition, pregnancy, etc. The causes of limited edema are: inflammatory diseases such as cellulitis, boils, carbuncles, etc.; lymphatic reflux disorders such as lymph node dissection, filariasis, etc.; venous reflux disorders such as varicose veins, venous thrombosis, phlebitis, etc. There are many causes of edema. Certain heart diseases can be manifested by edema, but edema is not necessarily a heart disease. If you do have generalized or limited edema, in order to avoid aggravation of the condition and delay in treatment, it is recommended that you consult a doctor in time and take reasonable treatment measures under the guidance of a specialist.