Loss of Sensation in Skin After Flea Bites

Loss of sensation in the skin?

Recently, I have many wounds on my foot from flea bites, but the wounds are about to heal.
I am still applying medication because I am afraid of cellulitis.
However, while applying the medication, I noticed that the skin near the flea bite sites is completely numb when I press it with my fingernail.
What could this situation indicate?

QQ, 20~29 year old female. Ask Date: 2017/05/11

Dr. Jiang Junyi reply Neurology

Hello, your symptoms may suggest peripheral neuropathy, which is generally categorized into motor and sensory types, each presenting with various symptoms.
Sensory nerve disorders can cause tingling or numbness in the hands and feet, particularly at the tips, and may feel like pinpricks, crawling sensations, or even electric shocks.
Peripheral nerves function like electrical wires, and peripheral neuropathy indicates a problem with these wires, leading to impaired message transmission.
Your physician may arrange for a nerve conduction study, which involves electrically stimulating the nerves to assess for any conduction abnormalities.
This helps evaluate nerve function, similar to checking if a wire is broken or if its insulation is damaged.
I recommend consulting a neurologist for discussion and treatment.
Wishing you good health and peace.

Reply Date: 2017/05/11

More Info

When dealing with skin reactions after flea bites, it is essential to understand the body's response to insect bites and the healing process. Flea bites can cause localized inflammation, redness, and itching, which are typical allergic reactions. However, your observation of loss of sensation in the skin surrounding the bite sites is concerning and warrants further exploration.

Loss of sensation, or numbness, in the skin can occur for several reasons. One possibility is that the inflammation from the flea bites has affected the nerve endings in the area. Inflammation can lead to temporary nerve dysfunction, which may result in a reduced ability to feel sensations like touch or pressure. This is often a transient condition that resolves as the inflammation decreases and the skin heals.

Another potential cause of numbness could be related to the topical medication you are applying. Some topical treatments can cause skin irritation or even damage if used excessively or improperly. If the medication is too strong or if it is applied too frequently, it may lead to skin barrier disruption, which could contribute to altered sensation in the affected area. It is crucial to follow the instructions provided by your healthcare provider regarding the use of any topical treatments.

Additionally, if the bites have become infected, this could also lead to changes in sensation. An infection can cause swelling, which might compress nearby nerves, leading to numbness. Symptoms of infection include increased redness, warmth, swelling, and possibly the presence of pus. If you notice any of these signs, it is essential to seek medical attention promptly.

As for your concern about cellulitis (蜂窩性組織炎), it is a bacterial skin infection that can occur after insect bites. It is characterized by redness, swelling, warmth, and pain in the affected area. If you are worried about developing cellulitis, it is advisable to monitor the bite sites closely. If you notice any worsening symptoms or if the numbness persists, you should consult a healthcare professional for a thorough evaluation.

In the meantime, here are some recommendations to manage your symptoms and promote healing:
1. Avoid Scratching: Scratching can exacerbate inflammation and increase the risk of infection. Try to keep the area clean and avoid irritating it further.

2. Use Cold Compresses: Applying a cold compress to the affected area can help reduce inflammation and numbness. It can also alleviate itching and discomfort.

3. Follow Medication Guidelines: Ensure you are using any topical treatments as directed by your healthcare provider. If you experience increased irritation or numbness, consider discussing this with your doctor.

4. Monitor for Signs of Infection: Keep an eye on the bite sites for any signs of infection, such as increased redness, swelling, warmth, or discharge. If these occur, seek medical attention.

5. Consult a Healthcare Professional: If the numbness persists or worsens, or if you have any concerns about your symptoms, it is essential to consult a healthcare professional for further evaluation and management.

In summary, while loss of sensation in the skin after flea bites can be concerning, it is often related to inflammation or the effects of topical treatments. Monitoring your symptoms and seeking medical advice when necessary will help ensure proper healing and prevent complications.

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