Hair extensions can be fun and let you have the long hair you have wanted for a while! There are three major categories: Strand by strand extensions, weft extensions, and clip-on extensions. Most of the extensions look the same, but there are different ways of taking care of them, brushing them, etc.
Weft extensions are attached one row of hair at a time as opposed to strand by strand extensions which are small strands of the hair is attached one by one to small sections of your own hair by either weaving, gluing, heat fusing, clamping with metal tubes or using waxes and polymers. Depending on how well you take care of your extensions and how fast your hair grows they last from 2-6 months. Also, most of the time the hair extensions are real human hair, and you just have to find the color that best matches your hair. Hair extensions are usually found at most beauty supply stores.
All hair extensions, no matter what kind you get, must be washed and taken care of. Remember, it is real hair, so you wash it with shampoo and conditioner. It is really up to you how you want to wash them. If they are attached to your hair, you will have to wash them in the shower. Brush your hair gently before you shower to get any tangles out. Shampoo and conditioner like normal. Be extra gentle though. Also, try not to blow dry often. The heat may melt the glue if it is too hot. If they are clip ins, take them out, brush them like normal, shampoo and conditioner, brush them out again, and then lay them out to dry. Simple!
I just got hair extensions last week. Mine are strand by strand extensions, and were applied by heat fusion. I love it! It looks real, you can not even tell they are extensions! My hair is black, and so is the glue, so you can not see it!! I have to be extra careful brushing and combing my hair. It is a good idea to hold your hair (like in a ponytail) with your hands and brush/comb it like that. This way, the brush won't catch where the glue is and pull it out if you were to brush too roughly.
Hair extensions are really neat, especially if you are wanting your hair to grow longer. You can have long hair while waiting for your hair to grow out! I have also heard it makes your hair grow faster, but I am not sure about that one. Here are some other sites that may be able to help you!