Here's another forward bend that's perfect if your headache is caused by tight shoulders. Sit on the floor so your shins are parallel and hip distance apart. Interlace your hands behind you in a double fist and lean forward, coming into a variation of Child's Pose. Stay here if this feels good, or lift your hips into the air so you're now resting on the top of your head in Grounded Tipover Tuck. Lower your hands as much as you need to feel a stretch in your chest, shoulders, and the back of your neck. Stay for five or more breaths.