The corner of the left eye is more itchy. If the itchiness is more intense and the more you rub it, the more itchy it becomes, accompanied by congestion in the white of the eye, most often consider the possibility of allergies. Most of these types of allergies are due to seasonal allergies, perennial allergies that cause itchy corners of the eyes. Anti-allergic treatment can be carried out with Olopatadine drops and Emedastine drops. If these two medications do not work after 1-2 weeks of use, you can switch to treatment with Dimethoate or Flomipron, which will have an anti-allergic effect. After complete suppression of eye itching, you can switch to Olopatadine and Imipramine for 1-2 weeks and then stop using them to consolidate the anti-allergic effect.