Headache with heaviness, tightness, and dizziness for several days may be due to tension, stress, or prolonged screen and study strain. Try taking regular breaks, maintaining proper posture, and ensuring good sleep to reduce pressure on the head. Stay well hydrated and limit continuous screen use to improve concentration. If the symptoms persist or interfere with daily activities, it is advisable to consult a doctor for proper evaluation and guidance.

It is unlikely that your current symptoms are directly related to the head injury from childhood, but severe headaches and episodes of loss of consciousness are important warning signs that should not be ignored. These could be due to conditions like migraine, seizures, or other neurological issues. Consult a neurologist for proper evaluation, as getting a timely diagnosis will help identify the exact cause and ensure you receive the right treatment.