Difficulty sleeping at night with daytime drowsiness and irritation is often due to poor sleep habits, stress, anxiety, or an imbalanced sleep routine, and it can usually be improved with simple lifestyle changes. Try to maintain a fixed sleep schedule (go to bed and wake up at the same time daily), avoid mobile screens, caffeine, and heavy meals at least 2-3 hours before bedtime, and create a calm, dark, and quiet sleep environment. Regular daytime activity or exercise, getting some sunlight, and avoiding long daytime naps can also help reset your sleep cycle. Simple relaxation techniques like deep breathing or meditation before bed may reduce irritation and help you fall asleep naturally. If the problem continues for more than a few weeks, or if you feel persistent anxiety or low mood, it is important to consult a doctor, as you may need further evaluation or short-term treatment.