What causes black hair on fingers?

The condition of the fingers is very easily affected, because the fingers are where the most terminal nerves of the human body are located, and it is easy to show symptoms of related organ diseases. Therefore, when you encounter inexplicable health conditions in your fingers, you must pay more attention to avoid signs of worsening disease. Among them, what is the reason for black fingers? Let’s take a look at the explanation below, I hope everyone can understand it.

There are several reasons why your hands turn black:

1. Foods rich in zinc, copper and iron cause the skin on your hands to turn dark

Certain foods are also the root cause of darkening of the skin. Foods rich in metal elements such as copper, iron, and zinc have this disadvantage. These metal elements can directly or indirectly increase the amount and activity of substances such as tyrosine and tyrosinase that are related to melanin production.

2. Drugs and melanin cause the skin on your hands to darken

Many drugs also change the normal skin color. For example, chloroquine has a strong affinity for melanin, which aggravates the darkening of the skin color; about 10% of patients taking quinine develop blue pigment spots on their faces. Sedatives pose the greatest threat to skin color. Those who take them for a long time will develop butterfly spots on their face and neck, and their arms and other parts will turn brown-gray, light blue or light purple. In addition, repeated use of mercury-containing ointments can also leave brown pigmentation on the affected area. There are more anticancer drugs that cause skin color changes.

3. The natural environment damages the skin and causes the skin on the hands to darken

The culprit is ultraviolet rays, which stimulate the melanin in the skin and induce skin lesions such as freckles. Even on cloudy days, the "ultraviolet rays" are still strong. Ultraviolet rays can cause skin darkening, aging, and wrinkles. Human skin's response to ultraviolet rays causes redness, tanning and increased thickness of the epidermis in acute reactions, and leads to skin aging in chronic reactions.

4. Scrubbing too hard causes the skin on your hands to turn dark

Some people like to rub their skin vigorously when taking a bath, intending to wash it more cleanly. However, they do not know that rubbing too hard or repeatedly can also cause the skin to darken, which is called friction melanosis. The mystery of friction melanosis has not yet been fully revealed, but its relationship with improper bathing has been confirmed by experts. It is mainly caused by mechanical stimulation such as strong friction pressure on the local skin. It often occurs in people who rub hard with bath towels or chemical fiber bath towels. It manifests as light brown to dark brown pigmentation in a diffuse reticular pattern, and is more common on bony protrusions such as the clavicle, ribs, scapula, elbows, and knees.