10 Gangrene Symptoms
9. Bullae
Bulla is a medical term for a fluid-filled lesion that is usually larger than a regular blister. To classify as a bulla, it must measure roughly more than 0.5 centimeters in diameter. Bullae can be caused by inflammatory skin conditions or infections. Finally, note that bulla is the singular of bullae.
Bullae are a common sign of gas gangrene. In this case, they are an external sign of the activation of the body’s immune response in reaction to bacterial toxins. First, the infection manifests with pain and local swelling. Then, a watery and pink fluid starts to drain from the tissue and the color of the skin (overlying the affected muscle tissue) changes to bronze. Finally, the skin turns a blue or black color and bullae containing a hemorrhagic fluid can appear on the surface. Gas gangrene is a medical emergency that should be diagnosed and treated promptly.
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