4. Deep Vein Thrombosis
Deep vein thrombosis (DVT) can be a silent killer. DVT occurs when a blood clot forms in one of the veins deep within your body, most commonly the legs. Sometimes you’ll have symptoms. People who are sedentary (long flights or drives, on bed rest, etc.). The clot can break loose, travel to the lungs, and block blood flow.
Look for calf cramping or soreness, red/discolored skin, and warmth. If you have shortness of breath, pain on breathing, rapid pulse, coughing up blood, and light-headedness, get help immediately.