Skin discoloration refers to the change in pigmentation. 
The key player here is a substance called melanin.
Melanin is a class of pigment responsible for the colors of our eyes, hair, and skin.
Skin discoloration occurs when the production rate of melanin changes. 
Some essential oils have potent skin regenerating properties.
Here we have a list of essential oils for skin discoloration. There are enough scientific data to support the efficacy of these natural remedies for pigmentation disorder.
Types Of Skin Discoloration
Skin discoloration can be of many types. The most common few types are:
11 Essential Oils for Skin Discoloration (Evidence Based)
Following are some of the essential oils that are beneficial for your skin to great extent. It is capable of treating your discolored skin.
1. Lemon Essential Oil
Lemon essential oil may be beneficial for your discolored skin.
How to use lemon essential oil for skin lightening:
Make a blend of four to five drops of lemon essential oil with a tablespoon of carrier oil or even your night cream. Apply this blend to your affected area.
Note: Apply this oil only during night because lemon essential oil is photosensitive.
2. Tamanu Oil
Tamanu oil originates from the from the fruits of Calophyllum inophyllum or Tamanu plants.
The therapeutic oil is famous for skin and hair care in Southeast Asian and Polynesian countries.
Traditionally the oil is used for various skin conditions such as healing wounds, skin inflammations, etc.
The bioactive components in tamanu oil namely neoflavonoids have skin rejuvenating effects.
Researchers have experimented the efficacy of tamanu oil on human skin cells. Tamanu oil has exerted collagen producing and wound healing activities. 
A topical application of tamanu oil may treat skin discoloration.
How to use tamanu oil for hyperpigmentation:
Combine 2-3 drops of tamanu oil with a tablespoon of argan oil. Apply the solution on the discolored skin patches regularly.
3. Frankincense Essential Oil
It may brighten your dull skin and replenishes life to it.
How to use frankincense oil for pigmentation disorder:
Mix a few drops of frankincense oil with any healthy carrier oil of your choice and apply on the discolored skin areas.
4. Rose Essential Oil
This aromatic oil is like a medicine for the mind.
Apart from that, rose essential oil is beneficial for the skin in many aspects. 
Its rejuvenating properties may reduce blemishes and promote healing of damaged skin.
How to use argan and rose essential oils for dark spots on skin:
Mix a few drops of rose essential oil with two tablespoons of argan oil and apply on the skin.
5. Sandalwood Essential Oil
Sandalwood essential oil is popular since ancient times.
The oil has many beauty benefits. It may regulate pigmentation and even out skin tone.  It may also soften your skin and removes any scars or dark spots.
How to use sandalwood oil for skin pigmentation:
Mix five drops of sandalwood essential oil with a tablespoon of argan oil and apply.
6. Carrot Seed Essential Oil
Carrot seed essential oil may be one of the best oils for hyperpigmentation.
The oil is rich in beta-carotene that controls the production of melanin.  It may be effective for treating dark spots on the skin as well as melasma.
How to use carrot seed oil for hyperpigmentation:
Apply a few drops of carrot seed oil mixed with any carrier oil of your choice.
Read More: 13 Best Essential Oils for Skin Glow
7. Geranium Essential Oil
Geranium essential oil may be beneficial for both body and mind.
How to use geranium oil for dark spots and hyperpigmentation:
Make a blend of two tablespoons of aloe vera gel and five to six drops of geranium essential oil. Apply this mixture all over your uneven skin before going to sleep.
8. Chamomile Essential Oil
Chamomile essential oil is popular for its strong anti-inflammatory properties.
The oil is most suitable for post inflammatory hyperpigmentation.  You may also use this oil to reduce your dark scars or blemishes.
How to use chamomile oil for scars and discolored skin:
Mix 5 drops of chamomile and lavender essential oil each with 2 tablespoons of shea butter. Apply this mixture to fix your skin discoloration.
9. Lavender Essential Oil
Lavender essential oil has a soothing effect on the skin.
How to use lavender oil for skin discoloration:
Lavender essential oil works incredibly well in a blend with other essential oils. You can mix it in with chamomile or eucalyptus oil and any healthy carrier oil and apply on your skin.
10. Bergamot Essential Oil
Bergamot or sweet lemon essential oil is quite beneficial for the skin.
The oil contains astringent, antiseptic and antimicrobial properties. It may protect the skin from germs and pollutants, while encouraging the generation of healthy skin cells . It may also regulate the distribution of melanin throughout the skin evenly.
Home remedy for skin discoloration using bergamot oil:
Like lemon essential oil, you need to apply bergamot essential oil only during the night. The best way is to apply before going to sleep.
11. Eucalyptus Essential Oil
Eucalyptus essential oil is rich in healing properties that promote faster healing of the damaged skin.
The oil has its contribution in treating sunburned skin. It may be a good option to treat discoloration of your skin as well. 
How to use eucalyptus oil for discolored skin:
A blend of two tablespoons of jojoba oil with a few drops of eucalyptus essential oil is all you need to apply on the discolored skin patches.
Tips and Precautions
- Try to buy 100% essential oils from stores or shops that you can fully trust.
- Store the bottle of essential oil in a dry and cool place that doesn’t have direct sunlight.
- Never use an essential oil undiluted. Dilution is a very important step especially if you have hyperpigmentation.
- Don’t go under direct sunlight and use a sunscreen always.
- Maintain good hygiene and drink ample amount of water.
- Avoid using any of the mentioned oils if you have an allergy to it.
- Do a patch test on a small area before direct application.
- Avoid using essential oils during pregnancy.
- If you have severe hyperpigmented skin, consult a doctor first.
When to See a Doctor
There are many reasons of getting a discolored skin. It can be a birthmark, pigmentation disorder, or some skin conditions.
In case you notice a new discolored skin patch on the skin that won’t go away, consult a doctor. A doctor may diagnose your discolored skin patch via skin biopsy, blood test, etc.
It is necessary to examine the size, texture, color and shape of the discolored skin patch. Moreover, your doctor may investigate your past medical history and any other related symptoms with the discolored patches.
If the essential oils for skin discoloration don’t give result, go to a doctor for proper treatment.