Contact lenses are usually caused by discomfort or damage to the corneal epithelium when the contact lenses are first put in. 1. Non-adaptation: just wearing contact lenses on the symptoms of tears, the most common situation is caused by non-adaptation, the eye’s sensory nerve fibers are very rich, even after wearing contact lenses to the eyes, will cause a mild foreign body sensation, resulting in tears with a stinging sensation. 2. Corneal injury: If the patient wears contact lenses with rough movements, it is possible that the edge of the lens or nails may scratch the cornea, which may cause tingling sensation, foreign body sensation and tearing of the eyes. Patients should stop wearing contact lenses and take medication that promotes corneal repair, such as recombinant human epidermal growth factor drops and recombinant bovine basic fibroblast growth factor drops. Contact lenses just put on the stinging pain, has been running tears, you should promptly go to the hospital ophthalmology department for examination, after a clear diagnosis, by the doctor to formulate a reasonable treatment plan and guidance on the use of medication.