Acne is a common human skin disease characterized by areas of skin with red scales, blackheads, whiteheads, pinheads, pimples and papules. Acne occurs most commonly during adolescence, and sometimes might continue into adulthood. There are various types of acne, out of which the most common is acne vulgaris, which is found mostly among teenagers. The other types of acne are acne rosacea, cystic acne, nodular acne, acne inversa etc. There are several different types of acne, which are categorized according to the severity of the condition:
Grade 1: The mildest form of acne like blackheads and whiteheads
Grade 2: The moderate form of acne like increased blackheads,  whiteheads and pimple
Grade 3: Moderate to severe acne. More inflammations on skin…
Grade 4: Most severe form of acne, like cyst
BLACKHEADS
Blackheads are follicles that have a wider than normal opening. They are filled with plugs of sebum and sloughed-off cells and have undergone a chemical reaction resulting in the oxidation of melanin. This gives the material in the follicle the typical black color.
WHITEHEADS
Whiteheads are follicles that are filled with the same material, but have only a microscopic opening to the skin surface. Since the air cannot reach the follicle, the material is not oxidized, and remains white.
ACNE VULGARIS
Acne vulgaris is one of the most common types of acne, affecting teenagers and adults. This distressing and common skin condition develops due to overactive sebaceous glands during puberty.
ACNE ROSECEA
In some people this skin condition is caused by hot baths or prolonged sun exposure, while in others spicy foods and hot beverages may lead to the reddish complexion of the skin. Wind, cold weather and harsh skin care products may also be responsible for acne rosacea outbreaks.
CYSTIC ACNE
Cystic acne is by far the most severe form of acne, and comes under grade4 classification of acne. It is usually pus filled in nature. Squeezing this type of acne will result in serious consequences as well as prominent acne scarring.
NODULAR ACNE
Nodular acne is a severe form of acne vulgaris, classified as grade3 inflammation of acne. This develops from the progression of grade II acne like papules or pustules, Papules and pustules are grade2 acne. Inflammatory types of acne. This is the type of acne, which is commonly known as a pimple.
ACNE INVERSA
Acne inversa is a severe inflammatory skin condition manifesting through blackheads and painful red bumps filled with pus that may persist for weeks or even months.
