If you have an itchy scalp at night, common causes like psoriasis or eczema may be the first thing that come to mind. However, other reasons for your itchy scalp include hives, dandruff, lice, and ...

If you've ever parented elementary school-aged children, you know that a call you want to avoid is one from the school nurse notifying you that your child has been exposed to head lice. If such a call ...

Sea lice bites are an itchy rash caused by jellyfish larvae that get trapped in swimsuits after swimming in the ocean. The larvae release toxins that trigger irritation, redness, and welts on the skin ...