Type 2 hair is also known as wavy hair. This hair isn't completely straight, nor is it curly. Type 2 hair can range from loose loops to waves that slightly resemble the letter "S". The natural state of this hair type is a gentle, tousled look. The texture is usually flat by the scalp and becomes wavier from the ears down.
Wavy hair tends to be prone to frizz. Anti frizz/humidity products are recommended. To prevent the waves from flattening out, steer clear from oil based, or creamy products. Alight mousse or gel will do. Lighter products will prevent waves from being weighed down. Too much product will also weigh hair down.
Type 3 hair is curly hair. This hair type ranges from light to tight, springy curls. They have more volume and height at the root than type 2 hair. Curly hair can have a combination of different textures. Type 3 hair forms ringlets that are naturally defined without the use of manipulation or hair styling products.
The natural oils in the scalp don't reach all the hairs, causing type 3 hair to be very dry. Products that offer moisture can help. Try to stick to products that are for curly hair. Constant brushing of this type of hair can wreck curl definition and lead to a frizzy mane. Products with silicones or sulfates may temporarily prevent frizz, but over time will dry hair out.
Type 4 hair is kinky or coily hair. This type of hair is wiry and is very fragile. Although it appears to be coarse, it is actually very fine and the hair strands are tightly packed together. Type 4 hair is the driest of all hair types. This hair is not defined while wet, and when hair dries, it has a lot of shrinkage. If your hair seems to be more fluffy than curly, you have type 4 hair.
Those with type 4 hair have fewer cuticles at the scalp. That means there is less moisture being produced, causing hair to be dry. Products with moisture are a must! Coconut oil, jojoba oil and shea butter works well with this hair type. Deep conditioners help maintain moisture and protein treatments can help strengthen the strands. Avoid mineral, and petrolatum oils and heavy waxes