Vaccine Concerns: Nail Growth Issues After COVID-19 Shots - Family Medicine

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After receiving the first two doses of the AZ vaccine and the third dose of the BNT vaccine in January last year, I experienced interrupted nail growth on both big toes, followed by the appearance of Beau's lines.
By November last year, the nails had not fully grown back, and I decided not to receive any more COVID-19 vaccines, opting instead for the flu vaccine.
Now, the nail on my left foot has also interrupted growth.
What vaccines can I still receive?

Cathy, 50~59 year old female. Ask Date: 2023/10/17

Dr. Lin Zhebin reply Family Medicine


Hello: Generally, vaccination does not significantly affect nail growth or cause Beau's lines.
It is advisable for you to seek medical evaluation to check for any infectious diseases, cardiovascular issues, malnutrition, or other conditions that may impact nail growth.
If no specific physical problems are found during the examination, it may be more appropriate to consider the potential effects of the COVID-19 vaccine and the flu vaccine.
If it is indeed related to the COVID-19 vaccine (BNT), you might consider receiving the Moderna, Novavax, or Medigen vaccines instead.
If the flu vaccine is the issue, since there are egg-based (e.g., Kuo-Kuang, Sanofi, GlaxoSmithKline) and cell-based (e.g., Donyang) vaccines, you may want to try a different type than the one you received last year.

Reply Date: 2023/10/17

More Info


Nail growth issues, such as the interruption of nail growth and the appearance of Beau's lines, can be concerning for individuals who have received COVID-19 vaccinations. Beau's lines are transverse grooves that can appear on the nails, often as a response to systemic stress or illness. While there is no direct evidence linking COVID-19 vaccines to nail growth issues, it is essential to consider various factors that could contribute to these changes.

Firstly, it is important to understand that vaccines, including those for COVID-19, are designed to stimulate the immune system to produce a response against the virus. This immune response can sometimes lead to temporary systemic effects, such as fever, fatigue, or other mild reactions. However, these effects are typically short-lived and resolve within a few days. The occurrence of Beau's lines may indicate a period of stress or illness that could have been triggered by various factors, including infections, nutritional deficiencies, or other underlying health conditions.

In your case, having received two doses of the AZ vaccine and a third dose of the BNT vaccine, it is unlikely that the vaccines themselves are the direct cause of your nail growth issues. Instead, it may be beneficial to evaluate other potential causes, such as nutritional status, any recent illnesses, or even stress levels. Conditions such as iron deficiency anemia, zinc deficiency, or thyroid disorders can also affect nail growth and health.

Regarding your question about future vaccinations, if you are considering receiving additional vaccines, it is advisable to consult with a healthcare professional. They can assess your overall health, review your vaccination history, and determine the best course of action based on your specific circumstances. If you have concerns about the COVID-19 vaccines, you might want to discuss alternative vaccines that are available, such as Moderna or Novavax, which may be options depending on your health status and local guidelines.

Additionally, if you are experiencing ongoing issues with your nails, it would be prudent to seek evaluation from a dermatologist or a healthcare provider who specializes in nail disorders. They can conduct a thorough examination and may recommend tests to rule out any underlying conditions that could be affecting your nail growth.

In summary, while there is no established link between COVID-19 vaccinations and nail growth issues, it is essential to consider a holistic view of your health. Consulting with healthcare professionals can provide clarity and guidance on both your vaccination options and any underlying health concerns that may be affecting your nails. Regular monitoring of your health and maintaining a balanced diet rich in essential nutrients can also support overall well-being and potentially improve nail health.

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