The pain is not unbearable, but it is within the range of tolerable pain. The pain will be mild or moderate to severe. When cutting open the wheals, it is done horizontally along the texture of the skin, and there will definitely be pain in the process of cutting. This will instead be more convenient and only once painful. The surgery is usually performed on the eyelid gland due to acute inflammation caused by bacterial infection, which gradually changes to form an abscess cavity. The surgery is often performed at a later stage of the mydriasis, after the pus has been generated and the fluctuating sensation of subcutaneous pus can be palpated, and the pus fluctuates and builds up before surgical incision is required to drain the pus completely and the mydriasis will gradually improve.