People with burning eyes usually suffer a feeling of burning and irritation of the eyes, Also, it may accompanied with itching, tearing even discharge. And there are many reasons that can cause burning eyes. And I need you give me more information to know why you got burn in eyes when you lay down. Generally speaking, burning eyes can result from environmental pollutants such as tobacco smoke, smog, or dust or household items etc. Besides, Allergies, Conjunctiviti can also contribute to burn eyes. So, you'd better take an eye check first by eye doctor.