In nature, there always exists a process of self-balance. However, when ignorant human interference disrupts this natural process of self-regulation, the harmony of nature is disturbed. As a result, various insects, pests, bacteria, viruses, and diseases emerge causing not only obstacles but also distortions in the natural functioning of the ecosystem. Every form of vegetation, whether it be herbs, medicinal plants, or trees, holds an essential and distinct role in the natural order. Generally, humans interact with plants in various ways—either by consuming them as food (fruits, roots, and other edible parts) or by using them for physical needs such as fuel wood, building timber, and furniture. Additionally, humans extract from them aromatic substances, incense, oils, and essences for daily use. Typically, diseases do not arise due to the influence of a single planet alone, but rather from the combined effects of several planetary forces. A particular planet, when extremely afflicted, merely represents the manifestation of a disease. This is why many individuals fail to recover even after performing remedies for a specific planet. The true requirement is to pacify all the planets that contribute to the onset of that ailment. When all the sources and planetary causes behind a disease are properly addressed, a person can attain complete freedom from illness.
Dr. Bhagwati Prasad Purohit (Sun,) studied this question.