Is swelling and inflammation the same thing?
Swelling occurs when a part of the body appears larger than usual due to an injury, infection or even an allergic reaction. Inflammation occurs as a result of an increased blood supply as a reaction to some kind of infection. Inflamed areas feel warmer and appear more rosy or red in colour.
What is in a cyst under the skin?
Cysts are closed pockets of tissue that usually fill with fluid or pus, and sometimes other material. Cysts are common and can appear anywhere on the body, but are typically non-cancerous (benign). Cysts occur due to the presence of an infection in the body, the clogging on sebaceous glands (oil glands), or even around foreign bodies (such as earrings).
What is a fatty tumour?
A fatty tumour is known as a lipoma. This benign tumour is composed of fatty tissue in the body and are usually soft to the touch, movable under the skin, and generally painless. Many are small in diameter but can enlarge to sizes as wide as 5 to 6 cm (1.9 to 2.3 inches). (8)
Reference:
8. US National Library of Medicine - National Institutes of Health. 2007. Giant lipomas of the upper extremity: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2687496/ [Accessed 24.08.2018]