Editing How to Apply Essential Oils (section)

== How to Use Essential Oils ==
Essential oils have diverse uses, primarily categorized into three main methods: '''olfactory inhalation''', '''topical application''' to the skin, and '''internal consumption''' under specific conditions. Different methods affect the pathway into the body and the speed at which effects manifest.

=== Aromatic Inhalation (Aromatherapy) ===
[[File:Oil.png|left|thumb]]

(File:Candle Diffuser.jpg - Wikimedia Commons) Aromatic inhalation involves breathing in the volatile scent of essential oils through the respiratory tract to exert physiological or psychological effects. This can be done using various tools to disperse the oil into the air, such as using a '''diffuser''' (aroma diffuser) to atomize the oil, burning an '''aromatherapy candle''' where the oil volatilizes with the heat, or applying drops to an '''aroma patch'''/'''essential oil necklace''' for slow release. In home environments, electric water-based diffusers or candle diffusers are often used to heat a container of water and essential oil, filling the room with aromatic mist. Inhalation can be '''indirect''' (like diffusing scent in a room) or '''direct''' (placing 1 drop of oil on a tissue and sniffing it under the nose). Via the olfactory pathway, essential oil molecules stimulate olfactory receptors in the nasal mucosa, sending signals to the brain's limbic system, thus influencing emotions, memory, and other psychological activities. They can also enter the bloodstream via the lungs to exert effects on bodily functions. Aromatic inhalation is fast-acting and one of the simplest and most common ways to use essential oils. For example, diffusing lavender essential oil in the bedroom before sleep helps create a relaxing atmosphere conducive to sleep; inhaling the scent of sweet orange or bergamot oil during times of stress can alleviate anxiety.

=== Topical Use (Skin Application) ===
Applying essential oils '''topically''' to the skin is another primary route of use, including methods like massage, bathing, compresses, and spot application. Due to their high concentration and potency, pure essential oils usually '''should not be applied directly''' to large areas of skin (Essential oil - Wikipedia). For topical use, essential oils must first be '''diluted''' in a suitable ratio with a base oil (also known as a carrier oil) to reduce irritation and promote absorption (Essential oil - Wikipedia). Common carrier oils include sweet almond oil, grapeseed oil, and jojoba oil, which are non-irritating and moisturizing, helping the essential oil penetrate the skin. When blending, typically add 1-3 drops of essential oil to 5 ml of carrier oil (about 1%-3% concentration) for use on the face or other delicate skin; body massage can use a higher concentration, but generally not exceeding 5%. '''Massage''' is one of the most common topical methods, using massage movements to enhance oil penetration and boost local blood circulation. For instance, massaging sore muscles with diluted rosemary or ginger essential oil can help relieve tension and pain. '''Bathing''' is also popular: add essential oils to warm bathwater (usually 5-10 drops, mixed first with bath salts or milk to disperse), allowing absorption through both skin and respiration for relaxation and skin care. Additionally, blended essential oil massage oils can be used for '''spot application/compresses''', such as dabbing a diluted peppermint oil blend on the temples to relieve headaches, or applying a gel containing tea tree oil to pimples for anti-inflammatory and antibacterial effects. Because essential oil molecules are very small and lipid-soluble, they can quickly penetrate the skin and enter the bloodstream and lymphatic system. Topically absorbed essential oils are metabolized and completely eliminated from the body without long-term residue.

=== Internal Use (Use with Caution) ===
'''Internal use of essential oils''' refers to ingesting essential oils orally, aiming for certain therapeutic or health benefits. However, it must be emphasized that '''casual internal consumption of essential oils is not recommended''' unless under the guidance of a qualified professional aromatherapist or physician. Ingesting undiluted pure essential oils directly is strictly forbidden as it can cause burns to the mouth and esophagus, or lead to severe adverse effects like liver and kidney toxicity. Certain essential oils (like lemon, peppermint) are used internally in capsule form within the European '''Aromamedicine''' system to assist in treating issues like indigestion or respiratory infections, but these applications '''must''' be determined by qualified professionals based on specific conditions and individual circumstances. Generally, if oral intake is necessary, the essential oil must first be diluted in a medium such as honey, vegetable oil, or milk before consuming a small amount. Even so, the choice of oil and dosage is critical and requires '''professional guidance''': for example, the English school of aromatherapy generally does not advocate oral use, while the French school of aromatic medicine employs oral therapy in specific clinical situations. Therefore, internal use of essential oils is reserved for '''special circumstances''' and should be avoided for non-urgent or non-professional needs. Anyone considering ingesting essential oils should consult a doctor or certified aromatherapist to ensure safety and efficacy.