Cellulitis is a common, potentially serious bacterial skin infection that affects the deeper layers of the skin, including the dermis and subcutaneous tissue. It typically begins as a localized area of redness, warmth, and swelling, often accompanied by pain. The infection usually results from bacteria, such as Streptococcus and Staphylococcus aureus, including methicillin-resistant Staphylococcus aureus (MRSA), entering the skin through a cut, wound, or insect bite.

The symptoms of cellulitis develop rapidly, with the affected area becoming increasingly swollen, tender, and painful. Fever and other systemic signs of infection, such as chills and fatigue, may also occur. If left untreated, cellulitis can spread to the lymph nodes and bloodstream, leading to serious complications like sepsis. In severe or untreated cases, surgery may be required to remove infected tissue and prevent further spread of the infection.

Diagnosis is generally based on clinical examination, but cellulitis can sometimes be mistaken for other conditions, such as deep vein thrombosis, eczema, or contact dermatitis, due to similar symptoms. In some cases, imaging or blood tests are needed to rule out other potential causes.

Treatment typically involves oral antibiotics, which are highly effective in managing mild to moderate infections. For more severe cases, intravenous antibiotics may be necessary. It’s crucial to treat cellulitis promptly to prevent complications and promote healing. While redness and swelling is not always cellulitis, if you suspect cellulitis, seeking medical attention is important to ensure proper treatment and reduce the risk of serious outcomes.