Acne is technically a condition while acne vulgaris is the name of the disease.
Acne can be concurrent with rosacea in some cases and causes confusion. Usually acne is common among adolescents and young adults and generally rosacea occurs with adults. There is one theory that acne and rosacea have a common cause:
Based on the theory that rosacea shares the same inflammatory features of acne, a recent study showed that, just as the combination of benzoyl peroxide 1 percent and clindamycin 5 percent gel is a powerful treatment modality for reducing Propionibacterium acnes levels, it also significantly reduces the papules and pustules of rosacea, according to Debra L. Breneman, M.D. ...."Benzaclin, once daily, was found to be well tolerated and effective in the reduction of papules and pustules in patients with rosacea," said Dr. Breneman. "This lends credence to the theory that P. acnes is a potential aggravating factor in rosacea. This gives dermatologists a very effective treatment for rosacea." Source > http://www.dermatologytimes.com/
"...Note: Pustules are NOT pimples. Pimples have a bacterial component to their makeup and are also mainly localized in and around the hair follicles....
...As the condition [ance/rosacea] progresses, flushing becomes more persistent and noticeable. Small, red, solid bumps (called papules) and pus-filled pimples (called pustules) may appear on the skin. Because these appear similar to acne, rosacea is sometimes called acne rosacea or adult acne. However, unlike acne, there are no blackheads. Though rosacea is sometimes referred to as "adult acne," it is a distinctly different and often more serious condition than acne vulgaris, which most commonly occurs during adolescence. While both conditions can cause pimples, rosacea requires different therapy -- acne treatments can actually make it worse -- and rosacea rarely goes away by itself....
According to the American Academy of Dermatology, Acne is the term for plugged pores (blackheads and whiteheads), pimples, and even deeper lumps (cysts or nodules) that occur on the face, neck, chest, back, shoulders and even the upper arms. Acne affects most teenagers to some extent, but can also affect adults in their 20s, 30s and 40s. While there is no permanent cure for acne, it is controllable...." [source]
For more information on rosacea click here.
