What is the difference between dermal plaques and melasma?

There are many types of spots, and the face is a common location for spots. Dermal spots and melasma are both types of spots, and it is not easy to distinguish them, but in terms of details and nature. There are obvious differences between dermal spots and melasma, and the factors that cause them are also different, that is, they are different in nature.

1. Dermal spots refer to pigmentation located in the dermis of the skin, or a mixture of pigmentation and residues of lead and mercury toxins. Dermal plaques are generally distributed on the cheeks of the face, and a few grow above and below the temples, in the form of dots and flakes. Melasma, also known as liver spots, is more common in women. It is a common acquired pigmentation transitional skin disease that occurs on the face. It occurs in sun-exposed areas and worsens after sun exposure.

2. The formation of dermal spots is generally caused by the use of freckle removal products that are harmful to the skin, such as products containing lead and mercury, hydroquinone, high-concentration fruit acid, etc., which will cause great damage to the skin. The skin must first undergo a trauma process, and after the inflammatory reaction of redness and swelling, it will peel off to reveal the fresh basal cells. The clinical manifestations of chloasma are light brown patches, which are symmetrically distributed on the forehead, eyebrows, cheeks, nose and upper lip. The pigmentation of the lesions is relatively uniform, and they are yellowish-brown patches with no normal skin in the center.

3. Dermal plaques are pigment deposits in the dermis layer of the skin, or they are caused by the mixture of pigmentation and lead and mercury toxins that remain in the human body. Dermal plaques are mainly distributed on the cheeks of patients, and in a small number of people they are distributed on the temples, and may appear in the form of dots and flakes. Chloasma is a hereditary spot that mostly occurs on the cheeks of patients. Moreover, such spots will gradually increase and deepen due to the long-term exposure of patients to external radiation.