The most common causes of dizziness when lying down are benign paroxysmal positional vertigo, ear infection, and sometimes poisoning. These conditions are generally temporary and often subside without any treatment. Other illnesses such as nausea or food poisoning can occasionally cause dizziness which may persist although one is lying down.

Dizziness is a sensation which often causes nausea, a “swimmy headed” feeling, or it a feeling of the room spinning. It is one of the most common medical complaints because so many factors can cause a dizzy feeling. Most of the time lying down or sitting with one’s head between the legs helps to alleviate the symptoms associated with dizziness, but occasionally it may persist despite changes in position.

Benign paroxysmal positional vertigo may cause dizziness when lying down, and is a condition which presents itself most often in the elderly. It is not known exactly what causes it, but it is likely due to debris inside of the ear which accumulates over time. This condition generally subsides on its own and does not last longer than a few months. Patients may receive medication to help alleviate symptoms in the meantime.

Ear infections may cause dizziness when lying down in much the same way as paroxysmal positional vertigo. When the inner ear is thrown off balance by buildup, infection, or other materials, the body’s equilibrium can be affected and dizziness and nausea may occur. Most infections clear up on their own, but bacterial infections may require the use of antibiotics.

Sometimes conditions like food poisoning or stomach viruses can cause dizziness when lying down. Although lying in bed generally causes dizziness to subside, sometimes very severe illness can cause it to persist. The treatment will depend on the condition. Dizziness which is long lasting or very severe should be investigated further by a medical professional. If poisoning is suspected, a poison control center or emergency services should be contacted immediately.

Dizziness which is accompanied by severe nausea or vomiting, shortness of breath, or other symptoms may be the sign of a serious medical condition. A doctor should be notified if dizziness is sudden and doesn’t subside within several hours. Those who are severely dizzy should not drive and should be taken to the doctor by a friend or ambulance if necessary.