Blood clots are differently sized clumps of blood that have formed inside your body.
Clotting is important to prevent excessive bleeding if you are injured or cut.
However, when a blood clot blocks blood flow to important areas of your body, it can be harmful, even deadly.
Blood clots can occur in your arms and legs, abdomen (stomach), heart, lungs, brain, and kidneys.
A blood clot in the brain may cause weakness in your face, arms, or legs, speech and vision difficulties, headache, and dizziness.
Many of these symptoms are the symptoms associated with other conditions, such as heart attacks and stroke. If you suspect you have a blood clot, see a doctor immediately.