Coming from someone who has experienced eating disorders…
-be extremely supportive and patient
-Avoid commenting on appearance or weight. People with eating disorders are already overly focused on their bodies. Even assurances that they’re not fat play into their preoccupation with being thin. Instead, steer the conversation to their feelings. Why are they afraid of being fat? What do they think they’ll achieve by being thin?
-Avoid giving simple solutions. For example, “All you have to do is accept yourself.” Eating disorders are complex problems. If it were that easy, your loved one wouldn’t be suffering.
For a long time, the standard for "normal" blood pressure was 120/80. The current thinking is that a more healthy pressure is actually 110/70. 106/64 is a little lower than the norm but may be totally normal for you. If you become dehydrated it can lower your blood pressure and if your blood pressure goes too low it can cause feeling faint or passing out. If it's never been an issue and your MD doesn't have a problem I wouldn't worry.
Cerebrospinal fluid (CSF), clear, colourless liquid that fills and surrounds the brain and the spinal cord and provides a mechanical barrier against shock. Formed primarily in the ventricles of the brain, the cerebrospinal fluid supports the brain and provides lubrication between surrounding bones and the brain and spinal cord. When an individual suffers a head injury, the fluid acts as a cushion, dulling the force by distributing its impact. The fluid helps to maintain pressure within the cranium at a constant level.
https://www.britannica.com/science/cerebrospinal-fluid