yahoo questions and answers

While there are ways to avoid acne on the whole, there are also times when you get that one pimple in the worst imaginable spot, and you feel like you're walking around with a giant bulls-eye on your face. Well, here's how you can single out that one pesky zit and make it disappear ASAP.

Do not touch or pop the pimple. It will only make the pimple more obvious and risk infection and scarring. Instead, take up the following routine, twice a day, until it disappears.
Wash your face gently but thoroughly with a mild, medicated soap and warm water.

The water shouldn't feel hot, and lukewarm is a little too cool.
Use a washcloth. If you don't have access to a washcloth, wash your hands very well with soap and water, and then make sure the soap is completely off.
Wash for about 30 seconds.
Pat your skin dry with a towel.
Apply a benzoyl peroxide topical cream on the pimple. Homeopathic alternatives include tea tree oil, baking soda paste (mix with a little water, apply and let dry), and witch hazel.
After topical treatment is dry, apply a basic face moisturizer (unscented and non-comedogenic) is best). Without moisturizing, the skin around the pimple can dry and irritate your skin, possibly making the pimple more inflamed and noticeable.
Cover the pimple with medicated concealer (optional).
Learn how to prevent acne in the first place, so that you stop that next monster pimple before it even starts.

Wear sunblock (oil-free) when you go out on a sunny day. Since pimples are raw skin, sunburn will only make it worse.

2.5% to 5% Benzoyl-Peroxide Solutions are sufficient; 10% or higher can irritate the skin and exacerbate the problem.
Don't use rubbing alcohol. It will sting like crazy and dry and irritate your skin.

toothpaste mixed with lemon juce left on overnight works too...