What it is: "Melasma is known as 'the mask of pregnancy' and can occur in pregnancy, with birth control pills or with no additional hormones beyond those of being a woman," Waldrof says. It typically looks like mottled brown discoloration on your cheeks, forehead or upper lip. It's triggered by UV exposure.

How to treat it: Topical retinoids and hydroquinone can help lighten the areas, Waldorf says. You can also try microdermabrasion or light peels, or if that doesn't work, a dermatologist may recommend the fraxel laser. The most important thing for melasma sufferers is to be "vigilant with sun protection," Waldorf says, because it usually recurs with sun exposure.

What it is: "Psoriasis is a skin disorder characterized by red scaly plaques classically on the elbows and knees but also elsewhere on the body," Waldorf says.

How to treat it: For mild cases, topical moisturizers or steroids will usually work, but for more extreme cases, your dermatologist will need to prescribe a biologic drug, Waldorf says. Unfortunately, psoriasis can't be prevented.

Who is susceptible: Waldorf says this problem can be genetic or hormonal. "If you have significant facial hair in a male pattern area, it is important to have lab tests by your physician (your dermatologist, gynecologist or endocrinologist)," she says. "Some women with excessive facial hair have polycystic ovary syndrome which is treated by the endocrinologist."

How to treat it: "Beyond shaving, waxing and depilatories, which are all temporary ways to remove hair, the options for permanent hair removal are electrolysis or laser hair removal," Waldorf says. She adds that dark hair works best with laser removal, but it's important to find a doctor that knows what he or she is doing. Another option is prescription Vaniqa Cream, which can slow hair growth.

How to fix it at home: Trygstad says most of the time when we mess up our hair color it ends up too dark. To lighten it (or remove a color you're not happy with), shampoo your hair as soon as possible, using the hottest water you can stand and either a clarifying shampoo or dish soap. This will help strip the color.

When to visit a salon: If shampooing with dish soap a couple times doesn't work, head to a salon for color correction (even if you dyed it at home). Trygstad says that trying anything else (like re-dying it) without a professional can just cause more damage to your hair and create an even bigger emergency.

What they are: "Think of milia like a large whitehead or a little cyst," Waldorf says. They look like small white bumps on your skin.

How to treat them: Waldorf says that if you are predisposed to them, you should avoid comedogenic products (a.k.a. products that can clog your pores), like thick eye creams or lotions. To treat them, try topical retinoids, microdermabrasion or products with salicylic acid. If they really bother you, a dermatologist can extract them, but Waldorf warns against trying to do this yourself.