When your hair is healthy, it has a bounce and a shine that is highly desirable. Going to bed with wet hair can have a negative impact on that luxurious hair over time, as the moisture left behind in the pillowcase works to break down the strength of the hair shaft. The wet hair combined with the wet pillowcase, work quickly at breaking down the hydrogen bonds of the hair, resulting in hair becoming brittle and losing its bounce and shine. The exposure to that moisture is counteracting all the work and effort you put in with your hair treatment products during showering, and now the fragile hair shafts are susceptible to damage more easily when you do normal things like brushing, curling, or blow drying the hair. The added buildup of fungus on the pillow every night exacerbates hair breakage, an occurrence that simply replays itself night after night until you sleep with dry hair on a clean pillow.
The bottom line is that you can now turn things around and avoid these dangers of sleeping with wet hair. Although many of the dangers discussed here can be quite alarming, they are just a fraction of the many consequences related to the growth of bacteria and fungus on your pillow. For those who suffer from respiratory illnesses, fungus will exacerbate diseases like sinusitis, asthma, and even your allergies. Some people find they suffer from increased colds, while others experience eye infections and increased poor vision.
By drying your hair thoroughly before you go to bed every night, you can help to avoid being exposed to the aforementioned consequences. One of the things you can do to drastically change the outcomes of wet hair in bed, is to simply adjust the times that you shower. Rather than showering right before bed, try to move up your shower time so that your hair is not damp as you climb into bed.