We associate summer with relaxing afternoons by the beach and enjoying the outdoors, but summer could just as easily mean a lot of bad hair days for some of us. If you have the dreaded humidity frizz, you've probably wondered why humidity causes your hair to go haywire. We explore how humidity turns sleek into frizz and offer some great strategies to help you beat the bad hair days. Why does your hair change when it's humid? Human hair is highly sensitive to humidity in the...