- In conclusion, determining insomnia can be done through six ways. They are, checking your sleeping patterns, evaluating your emotional and psychological state, checking if you have an underlying medical problem or illness, knowing if you are taking medication which causes insomnia as a side effect, assessing your daily diet, and consulting a doctor to diagnose if you have insomnia. If you follow these easy steps, you will be able to determine if you have insomnia or not.