Why does the thumb nail turn yellow?

Our nails can reflect the health of our body from the side. Changes in nail color indicate certain changes in the body. Recently I found that my thumb has turned yellow and thick. What's going on? Some say it is onychomycosis, some say it is caused by malnutrition. Which one is it? Let’s take a closer look at why the thumb nail turns yellow.

1. Onychomycosis. When nails become thick, the first thing to consider is onychomycosis, also known as onychomycosis, which is caused by fungi infecting the fingernails or toenails. It must be pointed out that there are no nerves and blood vessels in the nails, so the general topical anti-athlete's foot medicine is ineffective against onychomycosis. Clinical treatment of onychomycosis is mostly oral antifungal drugs or topical packs.

2. Side effects of drugs: some lipid-lowering drugs have such side effects. So when you go to the doctor for thickened nails, if there is no powder or empty space under the nails, onychomycosis is generally ruled out. The doctor will ask if you have other diseases or what drugs you take. This has little effect on the human body. Thickened nails are not important. Whether to stop or change the drug needs to be weighed by the doctor according to the condition.

3. Internal medicine diseases: mainly lung diseases that affect blood circulation. Nails are the farthest part from the heart, so they must have normal blood supply. When cor pulmonale occurs, resulting in insufficient blood supply to the distal end, the nails will become thicker. Compared with onychomycosis, this type of disease often involves most or all nails and thickens. The angle between the nail and the finger skin will slowly change to 180 degrees. In addition, ischemic diseases such as anemia will also cause such changes. Medically, it is called spoon-shaped nails.

4. Of course, nail malnutrition sometimes happens like this; of course, this is not thickening, but when the nail is malnourished, the nail becomes empty, giving the impression that it has become thicker, and there is white powdery substance under it, which is different from onychomycosis; nail malnutrition generally affects a small number of nails, or is accompanied by white spots or unevenness on the nail plate, which helps with diagnosis;

5. Symptoms associated with skin diseases; skin diseases such as lichen planus, alopecia areata, silver disease, etc., sometimes affect the nails and cause changes in the nails.

The above content analyzes why the thumb nail turns yellow. We know that the reasons for the yellowing of nails are as follows. The symptoms caused by many reasons will be different, and there are obvious symptoms. No matter what type it is, what we have to do is to actively treat it, rather than blindly ignore it.