Many modern forms of healing have their origin in traditional medicine. Many modern pharmaceutical drugs are processed, (formulated, purified, and packaged) from plants which had long use in indigenous cultures and traditions. And some herbal preparation and traditional procedures (like bone-setting) have enjoyed successes in health and in the healing art.
Then, why must one use them cautiously? This is because of the several serious medical problems the use of some of these traditional interventions causes. Little or no researches have been done on many of these concoctions. We hardly know what they contain, and the exact amount of the constituents. Are there some harmful substances? We can’t tell. Some chemical substances in plants become poisons if a certain amount is given without considering the size, age, and condition of the patients. We hardly consider these. How are we sure you are not taking a lethal dose that will eventually accumulate in the body, over-powering your liver or shutting-down your kidneys?! We are not sure! Some of these herbs have serious side-effects and cause allergic reactions. You see? Others interfere with modern drugs rendering them less effective or even poisonous! We are not even sure of the level of hygiene employed when preparing the concoctions. And so on.
I have a lot to say on this. But, maybe some other time. For now, all I will say is: use traditional medicine and interventions cautiously.
“Natural” doesn’t necessarily mean “harmless”.