Psidium guajava root, also known as smallpox pollen, can be eaten in decoction, in water, in wine, in pills and in many other ways. The most common way to eat Psidium guajava root is to eat it after decoction, or to eat it in soup with other foods. Taken alone, guayule root can be taken by steeping it in boiling water and then drinking it as a substitute tea. The active ingredients in the brew are limited and generally do not achieve a therapeutic effect. Psidium guajava root can also be crushed and taken directly with warm water, or stirred with warm water and consumed directly, among other eating methods. Psidium guajava root can also be soaked in wine and taken are possible. Psidium guajava root can also be used in pills and dispersions, and other Chinese medicinal herbs and tablets to make pills, or into the loose dose to take and other ways of eating. Psidium guajava root has the effects of clearing heat and fire (removing heat and fire from the body), generating fluids and quenching thirst (promoting the production of fluids to quench thirst), and subduing swelling and draining pus (eliminating pus and swelling and draining pus). Adverse effects are not clear, pregnant women should be cautious, and should not be used with Chuanwu, Prepared Chuanwu, Caowu, Prepared Chuanwu, Radix et Rhizoma Gastrodiae. Patients who are unwell are advised to seek timely medical attention, and it is recommended that under the guidance of a doctor, choose the appropriate way of eating according to their specific conditions.