Coughing Up Blood
In more advanced cases where a clot has affected the lungs, coughing up blood or blood-tinged mucus can occur. This symptom should always be treated as a medical emergency requiring immediate attention, regardless of other symptoms present.
10. Pain That Worsens With Standing or Walking
Discomfort that intensifies specifically when standing, walking, or flexing the foot can be a distinguishing sign of a blood clot in the leg, since movement increases pressure on the affected vein. This pattern helps differentiate clot-related pain from general muscle soreness, which