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Pus is an exudate, typically white-yellow, yellow, or yellow-brown, formed at the site of inflammation during infections, regardless of cause. [ 1 ] [ 2 ] An accumulation of pus in an enclosed tissue space is known as an abscess , whereas a visible collection of pus within or beneath the epidermis is known as a pustule , pimple or spot.
It can be a pus-like or clear fluid. When an injury occurs, leaving skin exposed, it leaks out of the blood vessels and into nearby tissues. The fluid is composed of serum, fibrin, and leukocytes. Exudate may ooze from cuts or from areas of infection or inflammation. [4]
In liquefactive necrosis, the affected cell is completely digested by hydrolytic enzymes, resulting in a soft, circumscribed lesion consisting of pus and the fluid remains of necrotic tissue. Dead leukocytes will remain as a creamy yellow pus. [1] After the removal of cell debris by white blood cells, a fluid filled space is left.
The final structure of the abscess is an abscess wall, or capsule, that is formed by the adjacent healthy cells in an attempt to keep the pus from infecting neighboring structures. However, such encapsulation tends to prevent immune cells from attacking bacteria in the pus, or from reaching the causative organism or foreign object. [26]
Diabetic foot infection is any infection of the foot in a diabetic person. [2] The most frequent cause of hospitalization for diabetic patients is due to foot infections. [ 3 ] Symptoms may include pus from a wound, redness, swelling, pain, warmth, tachycardia , or tachypnea. [ 4 ]
The wound can be allowed to close by secondary intention. Alternatively, if the infection is cleared and healthy granulation tissue is evident at the base of the wound, the edges of the incision may be reapproximated, such as by using butterfly stitches , staples or sutures .
The state Department of Health is urging caution after a resident died from an infection caused by bacteria that live in warm seawater or brackish water. Have a cut or wound? Stay out of the ocean.
However, blisters can be filled with blood (known as "blood blisters") or with pus (for instance, if they become infected). The word "blister" entered English in the 14th century. It came from the Middle Dutch bluyster and was a modification of the Old French blostre , which meant a leprous nodule—a rise in the skin due to leprosy .