You didn’t sleep enough “Your fight-or-flight hormones start to kick in, resulting in an increased heart rate, higher blood pressure, and stress,” says Salvatore Napoli, MD, of the New England Center of Neurology. And all of those things can contribute to a headache. Taking ibuprofen or naproxen can help you cope with the pain –

Shaving makes your hair grow back thicker and darker. It may seem like your hair is growing back with a vengeance, but in reality, it just looks that way. When hair grows naturally, the ends are tapered — but when it’s shaved, it grows back blunt, which makes it look thicker.

You should drink 8 glasses of water per day. Actually, you consume most of the water your body every day needs through food—so don’t force yourself to drink more water if you’re not thirsty. Remember: you can drink too much water.

Mucus You might think of it as a nasty, annoying inconvenience, but as Dr. Michael Johns puts it, “It is the oil in the engine. Without mucus, the engine seizes.” It doesn’t just lubricate your airways so you can breathe, but also line your digestive tract so you can convert food to energy as quickly

Kitchen Sink According to research published in the Journal of Applied Microbiology, the average kitchen sink harbors about 100,000 bacteria per square centimeter, compared to the average toilet’s 100 bacteria per square centimeter. Solution: Spray the faucet, basin, and your brush with a solution of ¼ cup of chlorine bleach and one quart of water