It is safe to shower with Dawn.
Dawn is safe to shower with although it's not the best to shower with as while Dawn is safe for skin it could dry out your skin over time and may cause irritation when used to shower with regularly.
It is OK to use Dawn on your hair occasionally but when used too much it could damage your hair.
If you use Dawn on your hair the Dawn dish soap will open your hair cuticles and lighten your hair color.
The reason people wash their hair with Dawn is to open the hair cuticles and allow color molecules to be washed away and remove or lighten the hair color.
Dawn dish soap opens the hair cuticles because it has a high pH level.
If you don't have shampoo you can wash your hair with some baking soda or apple cider vinegar.
You can also use some dish soap for washing your hair if you don't have shampoo although it's not best for hair but will work in a pinch.
Before shampoo many people would wash their hair using rice bran or a variety of plant materials or even homemade soaps.
In some cases some people would simply just use water and rinse their hair as good as they could.
Another way that people washed their before shampoo was to crack an egg open on their head and use the egg yolks to wash their hair with.
You should wash your hair at least once a week unless your hair gets more dirty more often.
Washing your hair once or twice a week is good enough for most people and washing your hair too often can cause damage to the hair and strip your hair of natural oils.
Washing your hair everyday is bad as it can strip your hair of natural oils and dry your hair out and dry your scalp out.
Unless your hair gets really dirty or you work in really dusty conditions where your hair gets dirty everyday then you should not wash your hair everyday.
Washing your hair once or twice a week is enough for most people.
Washing your hair too often can damage your hair and cause dry and itchy scalp.
It is bad to let your hair air dry as air drying your hair can cause trauma to the inner lipid layer and make your hair strands weaker as a result.
After washing your hair it's best to use a hair dryer to dry the hair.
But if you don't have a hair dryer then you will be fine with letting your hair dry other than possible damage to the inner lipid layer which can lead to weaker strands.