Boiling the roots of Houttuynia and Dandelion in water usually has multiple effects such as clearing heat and detoxifying, diuretic and urolithiasis, and clearing the lungs and dissolving phlegm, which can be used to assist in the treatment of body diseases.

1. Clearing Heat and Detoxifying: Boiling the roots of Houttuynia and Dandelion in water usually has the effect of clearing heat and detoxifying, alleviating symptoms such as severe heat toxin, and improving symptoms such as sore throat and difficulty in urination.

2. Diuretic and Urolithiasis: Boiling the roots of Houttuynia and Dandelion in water generally has the effect of diuretic and urolithiasis, alleviating symptoms such as difficulty in urination and defecation.

3. Clearing the Lungs and Dissolving Phlegm: Boiling the roots of Houttuynia and Dandelion in water usually has the effect of clearing the lungs and dissolving phlegm, alleviating symptoms such as lung heat and cough, and helping the condition to gradually improve and recover.