I had a big zit and pop it now is really black dot?

It sounds like you may be experiencing post-inflammatory hyperpigmentation (PIH), which is a common skin condition that occurs after an injury or inflammation to the skin. PIH can cause the skin to appear darker than the surrounding area and can last for several months or even years.

There are a number of things you can do to help reduce the appearance of PIH, including:

* Sunscreen: Sun exposure can worsen PIH, so it's important to protect your skin from the sun by using a broad-spectrum sunscreen with an SPF of 30 or higher.

* Moisturizer: Keeping your skin hydrated can help to improve the appearance of PIH.

* Vitamin C: Vitamin C is a powerful antioxidant that can help to reduce the appearance of PIH. You can apply a vitamin C serum to your skin or take a vitamin C supplement.

* Niacinamide: Niacinamide is another antioxidant that can help to reduce the appearance of PIH. You can apply a niacinamide serum to your skin or take a niacinamide supplement.

* Chemical peels: Chemical peels can help to remove the outer layer of skin and reduce the appearance of PIH.

* Laser therapy: Laser therapy can help to target and destroy the melanin that causes PIH.

If you are concerned about the appearance of PIH, talk to your doctor or a dermatologist. They can help you to develop a treatment plan that is right for you.