Does lack of oxygen cause nightmares?

In the 19th century, several authors held the view that nightmares are caused by oxygen shortage. The present study was designed to study nightmare frequency in patients with obstructive sleep apnea syndrome and its relationship to respiratory parameters.

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Also, what does it mean when you dream about someone who is already dead?

The most common reason you might dream of someone who is already deceased is that your brain is trying to process your feelings about this person that have come to your conscious awareness. When the thoughts and feelings buried deep in our subconscious rise to our conscious awareness, they manifest in dream form. In respect to this, what does it mean to dream about rapid water? Water generally represents an emotional state of mind, the website states, and often reflects what we might be feeling or repressing. If the river in your dream was flowing rapidly, change is ahead or you may feel out of control.

Then, does dreaming of water mean pregnancy?

Water in dreams may take on a dramatic form as pregnancy progresses. Toward her due date, a pregnant woman is more likely to dream of water as a symbol of the "breaking waters" that announce imminent childbirth. One woman at the end of her second trimester dreamed of big ocean waves that rose around her. What does it mean when you dream about natural disasters? The dream is likely a response or a forewarning of a big change, destroying your sense of security, plans, goals, and the hopes you had for the immediate future. Events such as losing your house to foreclosure, job loss or a forced relocation all are catastrophic changes that could elicit a tornado dream.

Then, what is the spiritual meaning of waves?

In the spiritual realm, the waves represent the change in flow we face throughout life. In other words, it represents the ups and downs of life and how we overcome it.