If you had no symptoms before your treatment, it is likely that the botulinum toxin drifted into the lower eyelid muscle or was directly injected into this area. The good news is that complications like this are not permanent and will resolve, however, steps should be taken to make sure that the surface tissue of the eye does not become dry. Dry eye symptoms include a scratchy or sandy feeling in the eye, and redness, and/or pain.
Here is what to do...notify the physician who injected you of the symptoms - you should be seen and evaluated. Begin use of drops to keep the eye moist if you have any symptoms of dryness. If your symptoms progress and include pain, immediately see your opthalmologist for more advanced treatment.
In 4-5 months, consider an evaluation of your lower lids by your plastic surgeon to determine if there is mild to moderate pre-existing laxity that may make you prone to this complication and dry eyes in the future. If so consider a procedure to tighten and improve the function of the lower lid.
Best Regards,
KC