Venous clots do not allow blood to return to the heart and symptoms occur because of this damming effect. Most often occurring in the legs or the arms, symptoms include:
- swelling,
- warmth,
- redness, and
- pain.
Arterial clots do not allow blood get to the affected area. Body tissue that is deprived of blood and oxygen begins to die and becomes ischemic (isch=to restrain + emia = blood)
- Pain is the initial symptom of the ischemia, or oxygen deprivation due to loss of blood supply.
- Other symptoms depend upon the location of the clot, and often the effect will be a loss of function. Heart attack and stroke are self-explanatory.
- In an arm or leg, in addition to pain, the limb may appear white, andweakness, loss of sensation, or paralysis may occur.
- If the blood supply is lost to an area of the bowel, in addition to intense pain, there may be bloody diarrhea.
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