Rash is the response of blood vessels in the dermis. To stimuli from outside and inside the body, such as food, medicine and biological conditions, physical
symptoms of urticaria occurs when the body the patient was allergic to stuff themselves into the skin exposed by eating or by intramuscular injection. Subcutaneously or into the blood vessels, encouraging the patient. It makes blood vessels expand under the skin. Intravascular fluid to seep out of the blood vessels caused redness, swelling, burning, itching can sometimes be a pain with it. If the expansion of the blood vessels in the upper dermis and swelling heat is clearly called for. Shallow hives (urticaria), if the growth of blood vessels in the deep dermis. The redness is often not clear, but the swelling is found deeper than called hives (angioedema), rash, hives shallow areas of the skin may occur. Diameter size from 0.5 cm to 20 cm rash many forms such as round, oval, ring, ring, many bands come together. Or a map Hives, rash, usually around the eyes, mouth, deep forearm severe cases are very swollen. Especially on the face and neck, which is a warning that patients may be dangerous. By obstruction of the airway. If the patient is tight Breathing is not easy Should I see a doctor immediately for treatment.