Rewrite the following sentence in past perfect tense and indicate the possible causes of the headache based on the table below. 
According to the medical history, she had experienced a headache with a throbbing pain on the left side of her head, accompanied by nausea and sensitivity to light. The possible causes could be tension headaches, migraines, sinusitis, or a neurological disorder. 
Medical History Table:
| Symptoms  | Possible Causes |
| ------------- | ------------- |
| Throbbing pain on one side of the head, Nausea, Sensitivity to light  | Migraine |
| Dull aching pain, Pressure around the forehead or the back of the head and neck  | Tension headache |
| Pain and pressure around the eyes, cheekbones or the forehead, Nasal congestion  | Sinusitis |
| Severe headaches, often on one side of the head, accompanied by vision changes, speech difficulties, and dizziness  | Neurological disorder |
user
sure, i'd be happy to help! here is the sentence rewritten in the past perfect tense:

according to the medical history, she had experienced a headache with a throbbing pain on the left side of her head, accompanied by nausea and sensitivity to light. the possible causes could have been tension headaches, migraines, sinusitis, or a neurological disorder.

based on the table provided, the possible causes of the headache could be:

1. migraine: the throbbing pain on the left side of the head, accompanied by nausea and sensitivity to light, are all symptoms of a migraine.
2. tension headache: the dull aching pain and pressure around the forehead or the back of the head and neck are typical symptoms of a tension headache.
3. sinusitis: the pain and pressure around the eyes, cheekbones, or the forehead, along with nasal congestion, are all indicative of sinusitis.
4. neurological disorder: severe headaches, often on one side of the head, accompanied by vision changes, speech difficulties, and dizziness, may be indicative of a neurological disorder.

it is important to note that this is not a medical diagnosis, and a qualified medical professional should be consulted for a proper diagnosis and treatment plan.
assistant
Sure, I'd be happy to help! Here is the sentence rewritten in the past perfect tense:

According to the medical history, she had experienced a headache with a throbbing pain on the left side of her head, accompanied by nausea and sensitivity to light. The possible causes could have been tension headaches, migraines, sinusitis, or a neurological disorder.

Based on the table provided, the possible causes of the headache could be:

1. Migraine: The throbbing pain on the left side of the head, accompanied by nausea and sensitivity to light, are all symptoms of a migraine.
2. Tension headache: The dull aching pain and pressure around the forehead or the back of the head and neck are typical symptoms of a tension headache.
3. Sinusitis: The pain and pressure around the eyes, cheekbones, or the forehead, along with nasal congestion, are all indicative of sinusitis.
4. Neurological disorder: Severe headaches, often on one side of the head, accompanied by vision changes, speech difficulties, and dizziness, may be indicative of a neurological disorder.

It is important to note that this is not a medical diagnosis, and a qualified medical professional should be consulted for a proper diagnosis and treatment plan.
assistant