It's called "alternative" medicine for a reason. It should be a backup plan, at best. Maybe it will help with minor aches or oils to help sunburns, but if you have a real sickness, get yourself to a doctor who has fancy machines that can literally look insider your body and give a diagnosis.
Science has predictive capabilities. That's what makes it powerful. Most alternative medicine is a shot in the dark.
The global market for herbal remedies is $60 billion and growing. The thing to consider is that herbal medicine is part of holistic medicine, where the entire person's life is taken into account. How else can you treat a patient unless you really understand a patient! Herbal medicine doesn't have to be some kind of backwoods ancient cultural practice. It can be as modern as hipster glasses.
"I can’t tell you how many times I’ve been asked 'What is the best herb for headaches?' over the past 25 years since I first started in the natural health field. My answer is always the same: 'That depends on whether your headaches are a symptom of stress, neck tension or misalignment, anxiety, excessive radiation from computer work or television, liver problems, gallbladder problems, blood sugar fluctuations, neurotoxic chemicals in your food, head trauma, chemicals in your home or office, or other factor.'"