Clinically, there are some patients who suffer a lot, that is, they do not know why there are “snowflakes” like flakes on the skin. These “snowflake”-like flakes, clear boundaries, different shapes and sizes, flakes with a red halo around. These flakes are very easy to fall off, a little inattention, clothing is a layer of flakes, and it is itchy, can be described as unbearable. This disease you say it is a disease, right, to the hospital, it seems that in addition to the skin lesions, other than few abnormalities found. Therefore, many doctors are at their wits’ end and can only treat the symptoms. In fact, this disease is also caused by the abnormalities of our immune system, this time the main target of the immune system is our skin, especially the stratum corneum of the skin. The cells of the stratum corneum are the outermost layer of the skin. Normally, these cells produce keratin, which is a strong protein that protects our body from external bacteria and viruses. The stratum corneum cells are also in constant renewal, you usually take a shower, rub a rub will find that there are a lot of things to be rubbed down, which in addition to dirt, there are a lot of aging, being renewed stratum corneum cells. After the cells of the stratum corneum are attacked, the speed of death is accelerated, and the “snowflake”-like rash described above is produced. This is called psoriasis, or psoriasis in some people. When psoriasis is mild, it is characterized by a rash and flaking of the skin, but if it is severe, it can be accompanied by skin infections, and in some cases, arthritis, called psoriatic arthritis. Because this disease is mainly an inflammation caused by the abnormal activation of the immune system, which attacks our skin, the combination of anti-inflammatory drugs and immunosuppressants is very effective in the treatment. However, care should be taken during the treatment of this disease. If there is already an infection of the skin, then be careful with immunosuppressants, because immunosuppressants weaken the ability of the immune system to fight bacteria, viruses and other microorganisms, and there is a risk that the infection will spread. Therefore, it is safer to strengthen the anti-infective system first, and then use immunosuppressive therapy after the infection is under control. There is another situation, some patients in the process of treatment, do not carry out formal treatment, once the condition improves, then reduce or even stop medication, which is very dangerous. This is very dangerous, because if the disease is not completely controlled, stopping the drug, will lead to a sharp deterioration of the condition, the seriousness of the disease can lead to “exfoliative dermatitis”, which is due to the immune system does not get a complete control of the drug in the case of stopping the immune system, the immune system a large area of “counter-attack”. This is due to a massive immune system “backlash” when the immune system is stopped without complete control. This is a life-threatening condition, so be careful. Again, this disease can take a long time to treat, half a year, a year or even longer, so be patient and don’t stop taking your medication halfway through the course of the treatment or stop taking your medication. However, this disease is not contagious, so do not be afraid.