Diane-35 gets rid of acne fast.
Women should consider the fact that one of the most effective treatments available for acne is Diane-35, and it's sold everywhere in the world except for the United States. Hint: Try Canada.
This is a whitehead or a closed comedone. Whiteheads develop when sebum is overproduced beneath a microcomedo, which is basically a clogged pore (or hair follicle). Sebum is important because it keeps your skin and hair moisturized in dry climates, but it's also full of fats and proteins, those things upon which most living things feed; it's an Old Country Buffet for bacteria. 
This is a blackhead or an open comedone. 
This is a papule. Some people mistake these for whiteheads. You see, whiteheads aren't technically infections--they're just white and bloated, with nothing left to do but burst. Papules are what happens when a whitehead or a blackhead finally does become infected. They're slightly larger, sometimes pink, and painful to the touch. This can happen either because your immune system isn't strong enough to fight off the bacteria or because you've been poking and prodding that whitehead and you've ruptured the pore (or hair follicle) beneath the surface of your skin. Once this happens, it's considered an acne lesion.
This is a nodule. At this point, your acne lesions are so infected that you risk the chance of acne scarring. Nodular or cystic acne is one of the more serious types of acne. Once your dermatologist sees nodules, they're going to start bringing in some of the topical antibiotics and more aggressive retinoids to do the heavy lifting because your body isn't doing its job. If you think you might be suffering from nodular acne, you should consult a dermatologist immediately. If you'd like more information about cystic acne treatment strategies, you should read our article about What causes acne?
There are a myriad of combinations of circumstances that may cause acne, but the short version is thus: oils called sebum from your sebaceous glands--your skin's own moisturizing lotion--build up along with dead skin cells and clog the hair follicle. It happens to all of us with varying severity. When this happens, your hair follicle will grow and push outward, causing a comedome to appear; they're also known as Whiteheads, Blackheads, Pimples, and Zits.
Now, if you have bacteria on your skin, and we all do, then the conditions are right for bacteria to grow inside of your swollen hair follicle. If that happens, then your body will start to produce white blood cells, injecting them into the hair follicle to fight the bacteria, causing what we call a "pustule." This pustule may grow, depending on how hard your body brings the hammer down. If it does grow, it will become red and tender with a white top that looks like it's about to burst.
This is the part where the pustule is supposed to burst. Sometimes it doesn't. Instead, your hair follicle ruptures at the bottom, down into your dermis. When this happens, it becomes a nodule. If that mixture of oil, dead skin, bacteria, and pus doesn't get released, it can become worse; it can become a cyst. If your skin doesn't break and release that sticky mess and becomes infected consistently, you have cystic acne, one of the most severe forms of acne.
Rare Acne Types
Infantile Acne or "Baby Acne" is the result (usually) of the acceleration of androgenic functions (i.e. hormones). Most cases of baby acne are noticed around 3-6 months of age. It's important to differentiate between infantile acne and neonatal acne, because the former may actually require treatment with topical medication, while the latter is a harmless skin condition that usually clears up after a few months.
Acne Conglobata is a severe form of acne, punctuated by deep, painful nodules usually present on the chest, back, and sometimes the butt. These nodules often form a network and their inflammation and subsequent eruptions can cause a considerable number of acne scars. It is not accompanied by a fever, which helps differentiate it from Acne Fulminans.
Acne Fulminans is a systemic disorder, meaning that the extreme number and depth of nodular acne lesions start to affect the body's ability to function as a whole. Sores are usually found on the trunk of the individual and are preceded by a fever and other symptoms associated with a systemic infection. It often requires a combination of steroidal and antibiotic therapies. It's rare, very rare, and it's commonly confused with Acne Conglobata.
Skin Conditions Mistaken for Acne
Rosacea is not acne. Acne Vulgaris requires the presence of comedones (clogged pores) and a hormonal component for a positive diagnosis. Rosacea is not accompanied by any clogged pores, but papules and pustules similar to those caused by Acne Vulgaris may be present. However, a typical rosacea diagnosis is made by observing the presence of redness in the nose and cheeks as well as visible blood vessels and dry skin.
Drug-induced Acne is the expression of papules (kind of like whiteheads) caused by the use of certain medications.
Acne Cosmetica is a fancy-pants term for acne (not Acne Vulgaris, mind you) caused by comedogenic cosmetic products (i.e. oil-based cosmetics).
Occupational acne is, again, a type of acne (still not Acne Vulgaris) caused by individuals being exposed to certain chemicals or materials in their workplace.
