Most likely this is a result of using hair dye or bleach in your hair, as this permanently damages your hair and inhibits your hair's ability to retain moisture. I suggest using the Nano Queratina Protein Hair Mask, it creates a much softer, smoother feel to the hair starting from first use.
All states prohibit providing alcohol to persons under 21, although states may have limited exceptions relating to lawful employment, religious activities, or consent by a parent, guardian, or spouse.
The age you are able to drink in bars etc is 18 but you can drink on private propety with family (for example) at any age.