If one side of the eye is red, swollen, painful, and accompanied by redness and swelling of the eyelid skin, pain that is noticeable when touched, and pain when blinking, consider a bacterial infection that causes inflammation of the lid gland, also known as mydriasis and pinhole. Because the inflammation is caused by a bacterial infection, the treatment is mainly anti-inflammatory and can be done with levofloxacin drops, or Tobex eye drops with Tobex eye ointment, or Gatifloxacin eye ointment. If the pain is more intense and the area of redness and swelling is larger, you can take oral antibiotics such as cephalosporin for systemic anti-inflammatory treatment, so that the treatment effect, and recovery time will be better. In general, small wheals can recover in 1-2 weeks, while large wheals may take 1-2 months to completely disappear.