Historically, staphylococci, pseudomonads, and Escherichia coli have been the nosocomial infection troika; nosocomial pneumonia, surgical wound infections, and vascular accessrelated bacteremia have caused the most illness and death in hospitalized patients; and intensive care units have been the epicenters of antibiotic resistance.
A warm spot can be noticed in the portion of your arm where there occurred the blood clot. You can also feel like having a burning sensation around the affected area and also at times you might feel like the area is warm when touched. In case of serious blood clots in arm, the area affected can turn red and inflamed.
Your armpit is a sensitive area because so many blood vessels and nerves pass through this area. You may experience pain under left armpit or the right one for many different reasons. It is quite natural to become worried because the area is so close to the breast and often makes you wonder if you have breast cancer.