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There is inconclusive evidence.

The Cochrane Review found there is inconclusive evidence to support whether or not electric fans may cause an adverse effect on one’s health1.


Some 'common-sense' approaches

However, air circulation will cool your body through evaporation. Evaporation of your sweat, specifically. Circulating warmer air, can cause you to sweat more, and the more that is evaporated, will begin to dehydrate you.

Dehydration's symptoms are2:

  • Dry, sticky mouth
  • Sleepiness or tiredness
  • Thirst
  • Decreased urine output
  • No wet diapers for three hours for infants
  • Few or no tears when crying
  • Dry skin
  • Headache
  • Constipation
  • Dizziness or lightheadedness

According to WebMD, Dry-mouth, caused by dehydration, can lead to having a sore throat3.

Also, a contributor to a sore throat, is post-nasal drip4. Post-Nasal Drip is due to excessive sinus mucus production (runny nose), and while sleeping - that mucus would slide to the throat, rather than out the nose.

Allergens and Mold Spores would be circulated at a greater rate, due to the increased air flow5 - especially if it is warm and moist air. Bioaerosals6 would be all around you, and blowing directly onto you.

In summary

While it isn't sufficient to say that your electric fan, specifically, made you sick, it is sufficient to say, that it was a contributor. The fact that it was warm and moist air; a breeding ground for bioaerosals, being directly circulated onto you, while your body is cooling itself by evaporative cooling7, and your body going hours without replenishing the moisture it is losing due to perspiration... Can indeed lead to waking up with a runny nose, sore throat, and headache.


CitationsCitation

1Electric fans for reducing adverse health impacts in heatwaves

2Dehydration

3Dry Mouth

4Post-Nasal Drip

5Dealing With Health Challenges

6Mold, dust mites, fungi, spores, and pollen: Bioaerosols in the human environment

7Perspiration Cooling of Body

There is inconclusive evidence.

The Cochrane Review found there is inconclusive evidence to support whether or not electric fans may cause an adverse effect on one’s health1.


Some 'common-sense' approaches

However, air circulation will cool your body through evaporation. Evaporation of your sweat, specifically. Circulating warmer air, can cause you to sweat more, and the more that is evaporated, will begin to dehydrate you.

Dehydration's symptoms are2:

  • Dry, sticky mouth
  • Sleepiness or tiredness
  • Thirst
  • Decreased urine output
  • No wet diapers for three hours for infants
  • Few or no tears when crying
  • Dry skin
  • Headache
  • Constipation
  • Dizziness or lightheadedness

According to WebMD, Dry-mouth, caused by dehydration, can lead to having a sore throat3.

Also, a contributor to a sore throat, is post-nasal drip4. Post-Nasal Drip is due to excessive sinus mucus production (runny nose), and while sleeping - that mucus would slide to the throat, rather than out the nose.

Allergens and Mold Spores would be circulated at a greater rate, due to the increased air flow5 - especially if it is warm and moist air. Bioaerosals6 would be all around you, and blowing directly onto you.

In summary

While it isn't sufficient to say that your electric fan, specifically, made you sick, it is sufficient to say, that it was a contributor. The fact that it was warm and moist air; a breeding ground for bioaerosals, being directly circulated onto you, while your body is cooling itself by evaporative cooling7, and your body going hours without replenishing the moisture it is losing due to perspiration... Can indeed lead to waking up with a runny nose, sore throat, and headache.


Citations

1Electric fans for reducing adverse health impacts in heatwaves

2Dehydration

3Dry Mouth

4Post-Nasal Drip

5Dealing With Health Challenges

6Mold, dust mites, fungi, spores, and pollen: Bioaerosols in the human environment

7Perspiration Cooling of Body

There is inconclusive evidence.

The Cochrane Review found there is inconclusive evidence to support whether or not electric fans may cause an adverse effect on one’s health1.

Citation

1Electric fans for reducing adverse health impacts in heatwaves

1
source | link

There is inconclusive evidence.

The Cochrane Review found there is inconclusive evidence to support whether or not electric fans may cause an adverse effect on one’s health1.


Some 'common-sense' approaches

However, air circulation will cool your body through evaporation. Evaporation of your sweat, specifically. Circulating warmer air, can cause you to sweat more, and the more that is evaporated, will begin to dehydrate you.

Dehydration's symptoms are2:

  • Dry, sticky mouth
  • Sleepiness or tiredness
  • Thirst
  • Decreased urine output
  • No wet diapers for three hours for infants
  • Few or no tears when crying
  • Dry skin
  • Headache
  • Constipation
  • Dizziness or lightheadedness

According to WebMD, Dry-mouth, caused by dehydration, can lead to having a sore throat3.

Also, a contributor to a sore throat, is post-nasal drip4. Post-Nasal Drip is due to excessive sinus mucus production (runny nose), and while sleeping - that mucus would slide to the throat, rather than out the nose.

Allergens and Mold Spores would be circulated at a greater rate, due to the increased air flow5 - especially if it is warm and moist air. Bioaerosals6 would be all around you, and blowing directly onto you.

In summary

While it isn't sufficient to say that your electric fan, specifically, made you sick, it is sufficient to say, that it was a contributor. The fact that it was warm and moist air; a breeding ground for bioaerosals, being directly circulated onto you, while your body is cooling itself by evaporative cooling7, and your body going hours without replenishing the moisture it is losing due to perspiration... Can indeed lead to waking up with a runny nose, sore throat, and headache.


Citations

1Electric fans for reducing adverse health impacts in heatwaves

2Dehydration

3Dry Mouth

4Post-Nasal Drip

5Dealing With Health Challenges

6Mold, dust mites, fungi, spores, and pollen: Bioaerosols in the human environment

7Perspiration Cooling of Body