Why am I getting darker after using niacinamide?

Skin darkening after using niacinamide may be caused by multiple factors, such as niacinamide intolerance, inappropriate niacinamide concentration, photosensitivity effects, allergic reactions, and incorrect application methods. It is recommended to use niacinamide under the guidance of a physician. Detailed explanations are as follows:

1. Niacinamide Intolerance

Some individuals may be intolerant to niacinamide. Following application, symptoms such as skin redness, itching, and even pigmentation may occur, which is referred to as a niacinamide intolerance reaction. When using niacinamide products for the first time, it is recommended to start with a low concentration and gradually increase the concentration after adaptation.

2. Inappropriate Niacinamide Concentration

A high niacinamide concentration may damage the skin barrier, triggering inflammatory responses and increasing melanin production. Choose niacinamide products suitable for your skin type and avoid excessively high concentrations. If skin damage has already occurred, discontinue the use of high-concentration products immediately and seek professional assistance.

3. Photosensitivity Effects

Niacinamide itself is not a photosensitive substance. However, if proper sun protection is not taken after evening application, UV exposure the following day may stimulate melanin production. After using niacinamide products, implement sun protection measures such as applying sunscreen, wearing a hat, or using an umbrella.

4. Allergic Reactions

Individuals with sensitive skin prone to allergies may develop localized allergic reactions and congestion after using niacinamide, leading to melanin deposition. If allergic symptoms occur, discontinue use of niacinamide products immediately. Under a physician's guidance, treat the allergy with antihistamine medications such as Cetirizine Hydrochloride Tablets, Loratadine Tablets, or Ebastine Tablets.

5. Incorrect Application Methods

Using excessive amounts of niacinamide product, uneven application, or failure to follow correct application steps may also lead to skin darkening. Apply niacinamide products correctly according to the product instructions or professional advice. Pay attention to dosage control and avoid overuse.

During use, if skin discomfort occurs, it is recommended to stop using niacinamide products temporarily and switch to mild, non-irritating skincare products, such as moisturizing creams containing ceramides or hyaluronic acid, to help restore skin barrier function.