Lower eye bags suddenly swollen blinking pain may be blepharitis, contact dermatitis, folliculitis and other diseases. 1. Blepharitis: Blepharitis may be caused by Staphylococcus aureus infection, blepharosphenoid gland dysfunction, squamous lesions and other factors. Patients will have symptoms of swelling, tingling and itching in the eyelid margin area, which is manifested as a sudden swelling of the lower eye bags that hurts when blinking. 2. Contact dermatitis: contact dermatitis may be caused by cosmetics, cleaning products, soap and other factors of stimulation. Patients will appear in the skin surface edema, pimples, burning pain and other symptoms, manifested in the lower eye bags suddenly swollen blinking pain. 3. Folliculitis: Folliculitis may be caused by skin trauma, shaving, plucking, sweating and other factors. Patients will appear pimples, redness, swelling, itching, tenderness, pain and other symptoms, manifested in the lower eye bags suddenly swollen blinking pain. If the patient appears to have lower eye bags suddenly swollen blinking pain, should go to the regular hospital, relevant examination, so as to identify the cause of the disease.