Hi, Thanks for your question. From the symptoms you are describing you may be experiencing blepharospasm (which just means an involuntary spasm of the eyelid muscles). It is very unlikely to be anything serious. Patients often experience this when they are excessively tired or stressed. Occasionally patients may have other eye problems that have precipitated the condition. There are some neurological associations but these are rare and you would have noticed other problems. In most cases no specific cause is found and as this is your first episode further investigation is probably not indicated. If you find that your symptoms are getting worse and the condition is interfering with your day to day life it might be worth seeing an eye doctor as they may decide to rule out anything serious. Furthermore, you may be offered simple treatments such as Botox injections into the eyelid skin or medication to control your symptoms. Try not to dwell on it too much and get a good night s sleep. You will most likely feel a lot better afterwards. Regards