The length of time required for treating spleen and kidney yang deficiency (deficiency of yang qi in the spleen and kidneys) varies due to differences in individual constitution and condition, usually around 2 to 4 weeks or even longer. It can be regulated by taking formulas that warm spleen and kidney yang qi, such as Zhenwu Tang and Lizhong Tang with Pineapple. Spleen and kidney yang deficiency is often caused by prolonged illness of the spleen and kidneys, which depletes qi and injures yang; prolonged diarrhea and dysentery, which damages kidney yang to the extent that both the spleen and kidneys are injured; deficiency of kidney yang (deficiency of yang qi of the kidneys), which fails to warm up spleen yang; and prolonged deficiency of spleen yang, which fails to enrich and nourish kidney yang. Clinically, it often manifests as cold pain in the abdomen, prolonged diarrhea, soreness in the waist and knee joints, cold limbs, difficulty in urinating, swollen limbs or frequent urination. Spleen and kidney yang deficiency can be regulated by taking Zhen Wu Tang or Radix Rehmanniae Sinensis. 1. Zhen Wu Tang has the effect of warming yang and benefiting water (replenishing yang qi in the body and promoting the circulation of water), and is commonly used in the treatment of coldness, cold limbs, palpitations under the heart, dizziness, unsteadiness, swelling of the limbs, or abdominal pain and diarrhea, coughing and wheezing, etc., caused by yang deficiency and water flooding (impeded water circulation in the body caused by yang deficiency). Not to be taken by pregnant women. 2. Radix Rehmanniae Chinensis Tang has the effect of tonifying deficiency and returning yang, warming the middle and dispersing cold (dispersing cold with medicine that warms the spleen and stomach), and is commonly used clinically for treating symptoms such as prolonged diarrhea, cold limbs, and tonicity of limbs in children. Yin deficiency and hyperactivity (deficiency of Yin fluid and hyperactivity of Yang Qi) is prohibited. It is recommended that patients in need of medication should seek medical advice in a timely manner for proper treatment under the guidance of a doctor.