Managing Skin Reactions After Using Anesthetic Ointment: What to Do? - Dermatology

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Hello, I previously sprained my ankle and applied a topical anesthetic that the doctor prescribed.
Later, the area where I applied the medication became itchy, and now there is a bit of a rash.
I noticed that the side effects listed on the medication include occasional itching and erythema, and it says to discontinue use if these occur.
I have already stopped using it.
Will the rash resolve on its own after some time, or should I see a doctor for a different medication to treat it? Thank you, doctor.

Shih, 10~19 year old female. Ask Date: 2017/07/02

Dr. Wu Yuxin reply Dermatology


Without actually seeing the lesion, it is impossible to determine the issue.
If it is very concerning, please seek medical attention as soon as possible.
A proper examination is necessary to understand the problem and to determine how to address it.

Reply Date: 2017/07/02

More Info


When managing skin reactions after using an anesthetic ointment, it's essential to understand the nature of the reaction and the appropriate steps to take. Based on your description, it seems that you experienced itching and redness after applying the ointment prescribed by your doctor for a sprained ankle. The side effects you mentioned, such as occasional itching and erythema (redness), are not uncommon with topical anesthetics and can occur due to sensitivity to the active ingredients or other components in the ointment.

First and foremost, since you have already stopped using the ointment, this is a good initial step. Discontinuing the use of a product that causes irritation is crucial to prevent further reactions. In many cases, mild skin reactions like the one you described can resolve on their own after the offending agent is removed. However, the duration for which the redness and rash persist can vary depending on individual skin sensitivity and the extent of the reaction.

Here are some steps you can take to manage your symptoms:
1. Avoid Scratching: It’s important to refrain from scratching the affected area, as this can exacerbate the irritation and potentially lead to secondary infections.

2. Cool Compresses: Applying a cool, damp cloth to the affected area can help soothe itching and reduce redness. This can provide immediate relief and help calm the skin.

3. Over-the-Counter Remedies: If the itching persists, you might consider using over-the-counter antihistamines (like diphenhydramine or cetirizine) to help alleviate the itching. Additionally, topical hydrocortisone cream can be applied to reduce inflammation and itching, but it should be used sparingly and not for prolonged periods without medical advice.

4. Moisturizers: Keeping the skin moisturized can help repair the skin barrier and reduce irritation. Look for fragrance-free and hypoallergenic moisturizers to avoid further irritation.

5. Monitor the Reaction: Keep an eye on the rash. If it begins to spread, becomes increasingly red or swollen, or if you develop blisters or other concerning symptoms, it’s important to seek medical attention.

6. Consult a Dermatologist: If the rash does not improve after a few days or if you have concerns about the severity of the reaction, it would be wise to consult a dermatologist. They can assess the situation more thoroughly and may prescribe a different topical treatment or oral medication if necessary.

In summary, while many mild skin reactions can resolve on their own after discontinuing the irritating product, monitoring the situation is key. If symptoms persist or worsen, professional medical advice is essential to ensure proper treatment and to rule out any potential complications. Always remember that your skin's health is paramount, and seeking help when in doubt is a prudent choice.

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