Painful pressure on the corner of the left eye near the temple may be related to blepharitis, scleritis, and foreign bodies in the corner of the eye. 1. Blepharitis: Frequent rubbing of the left eye with dirty hands and poor eyelid hygiene leading to bacterial infection of the eyelid or blepharoplasty can cause blepharitis, which results in the formation of a red, painful lump. If the lump appears in the corner of the eye, it can easily lead to painful pressure at the corner of the left eye. 2. Scleritis: Inflammatory lesions of the scleral tissue in the left eye due to various reasons, resulting in scleral congestion, edema and pain, which leads to painful pressure on the corner of the left eye. 3. Foreign body in the corner of the eye: when flying insects, gravel, dust and other external foreign bodies enter the left eye, the foreign body stays in the conjunctival sac in the corner of the left eye, and the pressure will stimulate the corneal nerves, which will lead to pain in the corner of the left eye by pressure. Patients are advised to visit the hospital in time to identify the cause of the problem and then treat it properly.