Early symptoms of covid-19

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Common Early Symptoms of COVID-19

Fever, dry cough, and muscle weakness are among the most prevalent and typical early symptoms of COVID-19, often appearing before more severe complications develop. Other frequently reported early symptoms include headache, sore throat, runny nose, nasal congestion, and myalgia (muscle pain) Biadsee2020Larsen2020Wang2022+2 MORE. Fatigue and chest pain can also occur in the initial stages Heidari2020Baj2020.

Loss of Smell and Taste as Early Indicators

Loss of smell (anosmia) and loss of taste (ageusia) are now recognized as prominent early symptoms of COVID-19. These chemosensory dysfunctions can sometimes appear before other classic symptoms like fever and cough, and in some cases, may be the only presenting symptoms Heidari2020Biadsee2020Ren2020+4 MORE. Studies have shown that a significant portion of patients report olfactory and taste dysfunctions at the onset of illness, with some experiencing these symptoms in the absence of other signs Biadsee2020Ren2020Yan2020+1 MORE. These symptoms are more frequently reported in patients with milder forms of the disease and may be more common in women Vacchiano2020Biadsee2020.

Neurological and Oral Manifestations

Early neurological symptoms such as headache, dizziness, and muscle pain are commonly reported in COVID-19 patients. Headache often presents with tension-type features and is frequently associated with muscle pain and joint pain (arthralgia), reflecting a flu-like syndrome Vacchiano2020Biadsee2020Baj2020+1 MORE. Oral symptoms, including dry mouth (xerostomia), can also be early indicators and may precede more typical respiratory symptoms Biadsee2020Ren2020.

Gastrointestinal and Skin Symptoms

Some patients experience gastrointestinal symptoms such as nausea, vomiting, and diarrhea early in the course of COVID-19, although these are less common than respiratory or neurological symptoms Larsen2020Wang2022Baj2020. Skin symptoms, including erythematous rash, urticaria, and chickenpox-like lesions, have also been observed but are not as frequently reported as early signs .

Symptom Patterns and Geographic Variation

The most common early symptoms can vary by region. For example, fever, cough, and loss of smell and taste were the most frequently reported symptoms in China, the US, and Italy, respectively, during the early pandemic. Patients in Europe and the US reported more nervous system and abdominal symptoms compared to those in China .

Conclusion

The early symptoms of COVID-19 are diverse but most commonly include fever, dry cough, muscle pain, headache, and fatigue. Loss of smell and taste are now recognized as distinctive early indicators and may occur before or without other symptoms. Neurological and oral symptoms, as well as less common gastrointestinal and skin manifestations, can also present early in the disease. Recognizing these early signs is crucial for timely diagnosis, isolation, and management of COVID-19.

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Most relevant research papers on this topic

Early neurological manifestations of hospitalized COVID-19 patients

Early COVID-19 symptoms include olfactory disorders, headache, arthralgia, and muscle pain, which are common flu-like symptoms and not specific to COVID-19.

Observational StudyHighly Cited

2020·

85citations

·V. Vacchiano et al.

Neurological Sciences·

DOI

Anosmia as a prominent symptom of COVID-19 infection.

Anosmia is a potential early symptom of COVID-19 infection, but its definite association with anosmia remains unpublished.

Highly Cited

2020·

129citations

·Firouzeh Heidari et al.

Rhinology·

DOI

Olfactory and Oral Manifestations of COVID-19: Sex-Related Symptoms—A Potential Pathway to Early Diagnosis

Women present with a different cluster of symptoms than men, suggesting a new clinical approach for diagnosing COVID-19.

Observational StudyHighly Cited

2020·

186citations

·A. Biadsee et al.

Otolaryngology--Head and Neck Surgery·

DOI

Modeling the Onset of Symptoms of COVID-19

The order of symptoms in COVID-19 patients differs from other respiratory diseases, suggesting fever should be used to screen for entry into facilities and record symptom occurrence.

Observational StudyHighly Cited

2020·

179citations

·Joseph R Larsen et al.

Frontiers in Public Health·

DOI

Dental Care and Oral Health under the Clouds of COVID-19

COVID-19 has a greater impact on dental care and oral health than other pandemics, with oral symptoms being early symptoms and dental professionals playing a crucial role in early identification and diagnosis.

Highly Cited

2020·

136citations

·Yan-Fang Ren et al.

JDR Clinical & Translational Research·

DOI

Association of chemosensory dysfunction and COVID‐19 in patients presenting with influenza‐like symptoms

COVID-19 is associated with early loss of smell and taste, which may aid in early screening and isolation of cases.

Observational StudyHighly Cited

2020·

733citations

·C. Yan et al.

International Forum of Allergy & Rhinology·

DOI

Differential COVID-19 Symptoms Given Pandemic Locations, Time, and Comorbidities During the Early Pandemic

Differential COVID-19 symptoms were found based on locations, time, and comorbidities during the early pandemic, with fever, cough, and loss of smell and taste being the most common in China, the US, and Italy.

Literature Review

2022·

16citations

·Yang Wang et al.

Frontiers in Medicine·

DOI

COVID-19: Specific and Non-Specific Clinical Manifestations and Symptoms: The Current State of Knowledge

COVID-19 can cause various clinical manifestations in different age groups, with fever, dry cough, muscle weakness, and chest pain being the most common symptoms, but atypical symptoms can also occur.

Rigorous JournalHighly Cited

2020·

389citations

·J. Baj et al.

Journal of Clinical Medicine·

DOI

Neurological symptoms, manifestations, and complications associated with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and coronavirus disease 19 (COVID-19)

COVID-19 patients may experience neurological symptoms and complications, highlighting the need for early detection and awareness of these complications to limit long-term consequences.

Literature ReviewRigorous JournalHighly Cited

2021·

280citations

·B. Harapan et al.

Journal of Neurology·

DOI

Vascular skin symptoms in COVID‐19: a French observational study

COVID-19 patients may experience vascular skin symptoms, such as erythematous rash, urticaria, and chicken pox-like lesions, which may be linked to ACE2 deficiency.

Rigorous JournalHighly Cited

2020·

274citations

·J. Bouaziz et al.

Journal of the European Academy of Dermatology and Venereology·

DOI

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