Richard, it sounds like you may have an infection. Warmth, swelling, redness and pain are signs of inflammation, which is your body's response to some sort of insult. In your case, you ought to see a doctor and get examined for a possible abscess, which is a localized infection that may need to be drained. If he or she cannot tell by examination, and if there is concern for an abscess, your doctor may order an MRI to better evaluate your leg.
Richard L. Young was born in 1953.
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