Unexplained Rash: Could It Be an Allergy After Dental Work? - Family Medicine

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Unexplained rash suspected to be an allergy?


On Tuesday night, I noticed some mild redness and a rash on my left thigh while taking a shower.
When I got dressed, I discovered that both of my palms had a rash resembling an allergic reaction, with the left hand being more severe.
The next morning, I woke up to find that the rashes had increased.
Since I had a tooth extraction on June 9th in the afternoon and have a history of heart problems, my doctor prescribed anti-inflammatory medication and antibiotics.
I initially thought the rashes might be a side effect of the medication, but if that were the case, I would have noticed it the same day or the next day; it wouldn't make sense to feel it after taking half of the medication.
It could be a combination of my allergic constitution and recent weather changes causing a recurrence of allergies.
I'm concerned that stopping the antibiotics could lead to complications, and based on my online research, the symptoms do not seem to align with any known side effects, so I am currently ruling out the possibility of complications.
I would like to know if I should get checked for allergies after my stitches are removed on Friday.

Xi Li, 20~29 year old female. Ask Date: 2017/06/15

Dr. Chen Taicheng reply Family Medicine


● If you have developed a rash on both palms, it is important to be cautious about the possibility of enterovirus or other viral rashes.
However, since you have previously taken medication, the likelihood of a drug rash is actually higher (it may not appear within one or two days; it can take three to four days to manifest), unless you have been taking anti-inflammatory drugs and antibiotics without any issues.
● In principle, if you are not feeling very uncomfortable, it is best to complete the entire course of antibiotics; however, if the rash worsens, or if you experience shortness of breath, swelling of the lips, etc., you should stop immediately.
Please discuss this further with your dentist.
The rash can be evaluated by a family medicine physician or a dermatologist.
● Wishing you good health, Dr.
Chen Tai-Cheng from Taoyuan Hospital, Family Medicine Department, cares about you~

Reply Date: 2017/06/15

More Info


It's understandable to be concerned about a rash that appears after dental work, especially when you have a history of allergies and are currently taking medication. Based on your description, there are several factors to consider regarding your rash and its potential causes.

Firstly, it is important to note that allergic reactions can manifest in various ways, including rashes, hives, and swelling. These reactions can occur due to a variety of triggers, including medications, dental materials, or even environmental factors. In your case, since you had dental work done (specifically tooth extraction) and were prescribed anti-inflammatory medication and antibiotics, it is plausible that the rash could be a reaction to one of these medications. However, as you pointed out, allergic reactions typically occur soon after exposure to the allergen, which makes it less likely that the rash is directly related to the medications you started taking.

Another possibility is that the rash could be a result of an allergic reaction to materials used during your dental procedure. Dental materials, such as latex gloves, dental adhesives, or even local anesthetics, can sometimes trigger allergic responses in sensitive individuals. If you have a known allergy to any of these materials, it would be prudent to discuss this with your dentist or healthcare provider.

Additionally, environmental factors such as changes in weather, exposure to irritants, or even stress can contribute to skin reactions. Given that you mentioned the recent weather changes, it is possible that this could be a contributing factor to your rash.

Regarding your concern about stopping the antibiotics, it is crucial to follow your healthcare provider's advice. If you suspect that the rash is a result of an allergic reaction, it is essential to consult with your doctor before making any changes to your medication regimen. Stopping antibiotics prematurely can lead to complications, especially if they were prescribed to prevent infection after your dental procedure.

As for your plan to check for allergies after your stitches are removed, this is a reasonable approach. It would be beneficial to have a healthcare professional evaluate the rash, especially if it worsens or if you experience additional symptoms such as itching, swelling, or difficulty breathing. They may recommend allergy testing or a referral to a dermatologist for further evaluation.

In the meantime, here are some general recommendations to manage your rash:
1. Avoid Scratching: Scratching can worsen the rash and lead to infection. Try to keep the affected areas clean and dry.

2. Use Mild Soap: When bathing, use a gentle, fragrance-free soap to avoid further irritation.

3. Cool Compresses: Applying a cool, damp cloth to the rash can help soothe irritation and reduce inflammation.

4. Over-the-Counter Antihistamines: If the rash is itchy, over-the-counter antihistamines may help alleviate discomfort. However, consult your healthcare provider before taking any new medications.

5. Monitor Symptoms: Keep track of any changes in your rash or new symptoms that may develop, and report these to your healthcare provider.

In conclusion, while it is possible that your rash could be related to an allergic reaction, it is essential to consult with your healthcare provider for a thorough evaluation. They can help determine the cause of your rash and recommend appropriate treatment. Your health and safety should always come first, so don't hesitate to seek medical advice.

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