Take a deep breath first, then hold it for as long as possible, then exhale and repeat several times.

Drink boiled water, especially warm water, take a big sip and swallow it several times.

Put the mixed gas into a plastic bag and inhale. The mixed gas contains 90% oxygen and 10% carbon dioxide.

Chew ginger slices.

Wash the raw leek, squeeze out the vegetable juice and take it orally.