Here Is What Happens When You Place An Ice Cube At This Point On Your Neck.

At the base of your skull on the neck there is a pressure point known as Feng Fu. If you place an ice cube there regularly amazing things happen. Sickness seems to disappear and you find yourself with more energy and vitality.

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Lie on your stomach and put an ice cube at the Feng Fu point. Leave it there for 20 minutes. You can also use a bandage to fix it in place if you’re on the go.
According to Higher Perspective these are the benefits:

It improves your sleep quality
It improves your mood.
It helps regulate your gut.
It relieves colds.
It relieves toothaches and headaches.
It may help relieve lung and cardiovascular diseases.
It may help thyroid issues.
It may relieve PMS.
It may improve mental health.

To see results do this once in the morning on an empty stomach and then again once before bed.