Early Flu Symptoms
Article Sources
- 1. Boktor SW, Hafner JW. Influenza. [Updated 2020 May 26]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2020 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK459363/
- 2. “Cold Versus Flu.” Centers for Disease Control and Prevention, Centers for Disease Control and Prevention, 30 Dec. 2019, www.cdc.gov/flu/symptoms/coldflu.htm.
- 3. Eccles, Ron. “Understanding the symptoms of the common cold and influenza.” The Lancet. Infectious diseases vol. 5,11 (2005): 718-25. doi:10.1016/S1473-3099(05)70270-X
- 4. Evans, Sharon S et al. “Fever and the thermal regulation of immunity: the immune system feels the heat.” Nature reviews. Immunology vol. 15,6 (2015): 335-49. doi:10.1038/nri3843
- 5. “Flu Symptoms & Complications.” Centers for Disease Control and Prevention, Centers for Disease Control and Prevention, 18 Sept. 2019, www.cdc.gov/flu/symptoms/symptoms.htm.
- 6. 6 North County Health Services, 18 June 2020, www.nchs-health.org/the-meaning-behind-different-types-of-coughs/.
5. Headache
It is currently unclear as to why headaches occur with the flu. It has been thought that headaches can be caused by the chemical reaction that occurs in an immune response. As mentioned before, an immune response is when the immune system works hard to ward off a harmful pathogen within the body.3Eccles, Ron. “Understanding the symptoms of the common cold and influenza.” The Lancet. Infectious diseases vol. 5,11 (2005): 718-25. doi:10.1016/S1473-3099(05)70270-X
Headaches can also be caused by dehydration or lack of nutrients. When an infection occurs, and especially if a fever accompanies it, the body is working very hard to combat the harmful virus or bacteria thus using more of the body’s resources even while resting.
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