Very sleepy, but can't fall asleep with eyes closed; head feels very heavy and swollen.

Feeling very sleepy but unable to fall asleep with closed eyes, along with a sensation of head fullness, may be related to overexertion, autonomic nervous system dysfunction, neurasthenia, and other causes. Treatment can be carried out through daily care, medication, and other methods. Specific analysis is as follows:

1. Overexertion

Overexertion may lead to physical fatigue and mental tension, making it difficult to fall asleep and maintain good sleep quality. This condition does not require special treatment. It is important to balance work and rest in daily life and ensure sufficient sleep, which helps relieve symptoms.

2. Autonomic Nervous System Dysfunction

Autonomic nervous system dysfunction is usually caused by prolonged excessive stress and may result in sleep disturbances and headaches. Patients may take medications such as oryzanol tablets or vitamin B1 tablets under medical guidance for regulation.

3. Neurasthenia

Neurasthenia may cause nervous system disorders and physical fatigue, thereby affecting sleep quality and duration. Patients may take medications such as sertraline hydrochloride tablets or fluoxetine hydrochloride capsules under medical supervision for treatment.

In addition to the common causes mentioned above, this condition may also be associated with depression, anxiety, and other factors. Patients should visit a hospital for diagnosis, identify the underlying cause, and receive standardized treatment accordingly.