Causes of Cellulitis are generally bacteria which enter inside body through break in the skin.
- Bacteria: Bacteria are the main causes of Cellulitis infection. Staphylococcus and Streptococcus are the most common bacteria which cause Cellulitis. But other bacteria like Methicillin resistant Staphylococcus aureus (MRSA), Pneumococcus, Clostridium, Haemophilus Influenzae may also cause Cellulitis.
- Skin injury: Any cut, abrasion, or skin wound may make way for bacteria to enter skin causing Cellulitis. Bacteria can enter through breaks in skin which are so minute to be seen by naked eyes. Also spider bites, insect bites, animal bites, tattoos, injection, etc may predispose towards Cellulitis. A foreign object like a thorn in the skin can also allow the bacteria to enter in it.
- Dental Infection: Any sort of tooth or gum infection may spread to sub mandibular space leading to Cellulitis of that area which is called Ludwig's Angina. It is a very serious condition and may be life threatening