Skin is red and swollen itch still has hard lump how to return a responsibility

If the skin shows redness, itching symptoms, as well as hard lumps, etc., it may generally be allergic inflammation of the patient's skin. Especially due to contact with special items, it may lead to certain contact dermatitis. Therefore, it may be manifested as local inflammatory edema. Due to inflammatory reaction, it may produce certain infiltration phenomenon, so there are hard lumps. Due to inflammation stimulation, it will inevitably stimulate peripheral nerves and produce itching symptoms.