Pustules are small round lesions that become inflamed and contain visible pus, which will appear red at the base with a yellow or whitish center. Inflamed pustules are cased by a chemical irritation from sebum components such as fatty free acids, and don’t usually contain a large amount of bacteria. Papules appear on the skin as small, firm pink bumps. Most of the time they are difficult to see and often have a rough feel. Papules are quite tender and are often considered an a step between non-inflammatory and inflammatory lesions. Cysts are large pus filled lesions that are present deep under the skin. They are usually very painful lesions, and can become quite inflamed. These large lesions form as a result of sebum spilling over the surrounding skin and as a result the local immune system produces pus. It is very common for cysts to leave deep scars. This condition is often referred to as Cystic Acne. Acne conglobata is a rare and serious form of inflammatory acne that develops mostly on the back, chest, and buttocks. It can be caused by a severe bacterial infection and there can also be a presence of pustules and cysts, which can make this condition even more painful. These lesions are hard, inconsistently shaped and are often accompanied by severe pain and inflammation. This type of acne is one of the most difficult to treat and can lead to permanent scarring. A macule is an acne lesion that has healed and leaves a red spot that can remain for days or weeks. Several macules at a time can result in the affected area having a inflamed appearance. Acne vulgaris is the most common diagnosis for teens entering into puberty. There are two other forms of acne vulgaris described below. Acne conglobata is a rare and serious form of inflammatory acne that develops mostly on the back, chest, and buttocks. It can be caused by a severe bacterial infection and there can also be a presence of pustules and cysts, which can make this condition even more painful. This type of acne is found more often in males. This is an even more sever form of acne vulgaris which has symptoms that may involve aching joints, lack of appetite, weight loss, fever, and a raised blood count as well as the usual breakouts. This is also more commonly found in males. It is common for people to associate acne rosacea with other types of acne. Although the symptoms of the two overlap, acne rosacea is not Acne. It is simply the reddening of the skin which can be controlled and treated with the help of a physician. Baby Acne is seen as tiny bumps on the newborns face and can show directly after birth and up to the first few weeks of life. This condition may also be referred to as acne neonatorium. You can be assured that it is not a painful condition and usually disappears after three months.