1. Skin scratches, urticaria
The patient's response to weaker external mechanical stimuli causes an enhanced physiological response, producing wheals on the skin. After scratching, the patient has local wheals and itching in tight belts, garters, etc. If the damage is deep or wide, or even expands to the sides into a block, local fever and tenderness.
2. Cholinergic urticaria
The rash is characterized by a generalized 1~3mm small wheal in addition to the palmoplantar area, surrounded by obvious wheals, which sometimes satellite wheals can be seen, and only red halo or small sparse wheals without red halo can be seen. Sometimes the only symptom is just itching without wheals. Cholinergic urticaria mostly occurs during or shortly after exercise, with itching, tingling, burning, heat or skin irritation, which can also be induced by heat or emotional stress.
3. Solar urticaria
After the skin is exposed to sunlight for several minutes, itching, erythema, and wheals appear rapidly. The wheals subside about 1 to a few hours after they occur. The rash may be accompanied by chills, fatigue, syncope, intestinal spasms and other symptoms.
4. Papular urticaria
It's hot, and after the human body is bitten by some insects, a small silt appears in the bite of a small number of people. Some people have pale white, irregular vasoconstrictor spots around the bite, and within a few hours turn into a prominent, irregular red wheal, itchy and unbearable, and a small papule or small blister forms in the center of the bite, a skin lesion called papular urticaria. Clinically, there are still many types of urticaria, of course, in addition to the 4 common types introduced above, there are also hot urticaria, cold urticaria, contact urticaria, exercise urticaria, tremor urticaria and other rare urticaria types. If friends with urticaria want treatment, they must go to a regular hospital to see what type of urticaria they have, and then take scientific treatment.