The biggest animal in the ocean, and in the world, is the blue whale (Balaenoptera musculus), a sleek, light-colored giant. Blue whales are thought to be the largest animal ever to live on the Earth. They reach lengths up to about 100 feet and weights of an amazing 100-150 tons.
You get a pimple when a pore in your skin gets clogged, usually with dead skin cells. Sometimes bacteria get trapped inside the pore, too, causing the area to become red and swollen. Cystic acne happens when this infection goes deep into your skin, creating a red, tender bump that's full of pus. It may hurt or itch. If a cyst bursts, the infection can spread, causing more breakouts.
However, the most common cause of pustules is acne. Acne, also known as pimples, causes inflamed patches of skin that contain pus or oil. Acne develops when the pores of your skin become clogged. Bacteria on the surface of the skin and the buildup of dead cells can also lead to acne. Pustules caused by acne can become hard and painful. When this occurs, the pustule becomes a cyst. This condition is known as cystic acne.