Trying new products and treatments can be hit or miss. Skin is different person-to-person, so not everything will work for everyone. On average, it takes about three to four months to see the full results on a skin care product on the skin. If you have more acute skin issues, it could take four to six months to see positive results.

There are three ways to tell if your skincare routine is working, according to an interview with two dermatol­ogists on Insider.

1. The skin is hydrated but not oily.

If the skin is soft and smooth to the touch, it is a good sign that skin is happy and hydrated with the new products and treatments.1 Oil will feel like a layer of film on the skin, while hydrated skin will just feel “normal”, no irritation, itching or flaking. Oily skin typically shines all over the face, while hydrated skin glows from the cheekbones, forehead and cupid’s bow.

2. The skin is not itchy or irritated.

If a client is complaining of pain or irritation of the skin after two to three weeks of using a new product, it is likely they may be allergic to an ingredient in the product. Have your client immediately stop using a product that causes skin irritation.

3. The skin is supple and uniform in color.

If a client does not have oily skin or any skin irritation, it is safe to say that the skin is hydrated and healthy, and the new products are working properly.