What does the expression pack mean for dark circles and nosebleeds?

The expression pack of nosebleeds under dark circles indicates that it is caused by allergic rhinitis. Because there are inflammatory substances in the blood vessels of patients with allergic rhinitis or sinusitis, the blood vessels will be slightly congested, forming blue-green skin directly under the eyes. Dark circles appear, avoid the long-term stimulation of dust and harmful gases, and actively prevent and treat acute respiratory infectious diseases.