###Human: Why do I have sleep problems when not on melatonin supplements? ###Assistant: Hello. If you are suspecting something like sporadic familial insomnia, it is wise to see a neurologist with your specific complaints. This is because it is very difficult to diagnose on the basis of symptoms only. It needs investigations like genetic analysis and sleep studies to confirm. My advice would be to not get overly anxious but to see a neurologist and get investigated properly. Also, melatonin is completely natural and safe and if you were feeling so relieved with it, it is wise to continue it for now. Consult your specialist doctor, discuss with him or her and with their consent take it. For more information consult a sleep medicine physician online -->