@manisha my preferred method using the oils is ingesting them sublingually and topically because I want them to go into my bloodstream quickly since I use them medicinally. I usually take a couple/few drops and keep them under my tongue, so they absorb fast right into the blood. For example, I had symptoms of indigestion late last night that woke me up. I immediately took three drops of a digestion blend sublingually and the relief was pretty instantaneous. I also rubbed a bit in and around my bellybutton. I've been working with oils for several years now. So, that's why I can use them and speak of them the way I do.
Some people ingest the oils in a vegetable capsule, but I don't like that method personally because then they're going into the digestive tract, which means it will be slower to absorb since your body will first digest them and then they'll be introduced into the bloodstream. I like fast and efficient results. An interesting astrological connection with oils is having something prominent in Rohini. I happen to have Mercury in Rohini, so I naturally have been drawn to study oils from quite young. People with a good/delighted Graha in Rohini will work really well with oils generally speaking. However, if a Graha is afflicted in Rohini, I have seen them to be drawn to oils but have faulty judgment when using them believing they are using the right ones when it wasn't true. Obviously, there are other things in the chart to be considered. But that's an interesting connection that I have come across through the years.
The oils are different than the Bach Flowers because the Bach Flowers only work on an energetic/emotional level, whereas the oils work on the same and on a physical level. Since they are working on our own physical bodies' chemistry, there is no oil that will work the same on everyone. The rule of thumb is if you use a therapeutic grade essential oil, and you don't feel a difference within 10 minutes then it's the wrong oil for what you need. Then you would try something else until you find what your body needs. That's how I've discovered what oils are going to work optimally for my own body. Another method people use for finding the right oils to use is through muscle testing. You can even use a pendulum to find the best oil to use because muscle testing and using a pendulum are basically reaching into your subconscious for the information. They're called essential oils because we're literally taking the essence of the plant, flower, root, shrub in a pure form into our own essence to work synergistically. The right combination of the oil's chemistry with our own chemistry works miracles in my honest opinion. However, not all oils are created equally that's why I want to highlight the "therapeutic grade" pure essence because unfortunately many are doctored with other things. Trying to use oils that you can easily get from the store isn't helpful for health purposes and in fact mainly may have negative results. I learned this slowly and the hard way when I first started exploring oils for aromatherapy. It has helped me tremendously finding a company that I researched and trust in how they source their oils. So, to summarize, the Bach Flowers are very light and won't harm because they are purely working on an energetic level. The correct therapeutic grade essential oils can help and support the body physically heal as well as using them for mental/emotional/energetic healing.