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In spite of some popular myths, shaving does not cause your hair to grow faster or thicker. The fastest way to grow a beard or mustache is to leave it alone. Shaving means you're starting with nothing again. Let your hair grow on its own for at least 4 weeks. Keep in mind that everyone's hair grows at a different rate. After the initial growth, you will probably end up feeling like it comes in much quicker after that. New growth feels itchy at first, but don't trim your hair yet. Instead, care for it by washing it, combing it, and using a conditioner made from jojoba or argan oil. Oil, dirt, and dead skin build up into a thick barricade your hair follicles struggle to break through. To prevent this, use a mild cleanser and warm water to clean your face. You can do this while you're in the shower. Clean facial hair looks softer and bushier, and it may also help if your hair seems to be growing in too slowly. Try washing your face when you wake up in the morning and before you go to bed at night. A gentle store-bought facial cleanser is better than standard soap, which can be abrasive and cause skin irritation. Consider using an exfoliating cleanser twice a week to help clear out the dead skin cells. Rub on a light moisturizer to keep your skin well-hydrated. Add it while your skin is still damp. Good moisturizers keep your skin and hair healthy as well as protected from irritation. It both improve your existing facial hair as well as removes debris that could slow down its growth. A good moisturizer can help even after you grow out your facial hair. Continue using it to prevent inflammation and breakouts. Try using a natural moisturizer made with an essential oil like eucalyptus. That kind of product can provide extra benefits due to how much essential oils help with facial hair growth. Use a beard comb made from something soft, such as boar's hair. Brush your hair out in the morning. Regular brushing makes facial hair appear thicker and fuller. It is also great for covering up patchy spots. Look for ingrown hairs and other damaged areas to treat. For instance, pull out ingrown hairs with tweezers, then brush over the spots. Look through pictures of different beard and mustache styles of find one you like. There are many different styles, including for thin or short hair. Style can hide poor hair growth, so consider consulting a professional stylist for advice. For instance, you can comb thicker areas to pull them over thinner ones. If you have short facial hair, try cutting it short or leaving stubble. Have a plan for your beard and mustache. Stick to it so your facial hair looks full even after you trim it.

Summary:
Let your facial hair grow without trimming it. Wash your face up to twice a day to stay clean. Apply a moisturizer after washing your face. Groom your facial hair after washing and moisturizing it. Style your facial hair to look full and fashionable.