Is prurigo nodularis associated with atopic dermatitis or diabetes?

Question

Hello doctor,

I have been reading about prurigo nodularis, particularly its association with chronic pruritus and inflammatory skin conditions. However, I am unclear about its underlying causes and the best treatment options. Could you explain what triggers prurigo nodularis and why it is so difficult to treat? What is the role of the immune system and nerve dysfunction in its development? I am particularly interested in emerging therapies, such as biologics like Nemolizumab and Dupilumab. How effective are they compared to traditional treatments like corticosteroids and antihistamines? What are the best strategies for managing itching and preventing skin damage from scratching? Additionally, are there any lifestyle modifications or alternative therapies that may help? Lastly, is prurigo nodularis associated with systemic diseases like diabetes or atopic dermatitis, and should patients undergo further medical evaluation when diagnosed?

Please help.

Thank you.

Answer 1

Hello,

Welcome to icliniq.com.

I understand your concern.

Prurigo nodularis (PN), also known as nodular prurigo, is a skin disorder characterized by pruritic (itchy), nodular lesions, which commonly appear on the trunk, arms, and legs. Patients often present with multiple excoriated nodules caused by chronic scratching. The exact cause of PN is unknown, It may result from too many nerve or immune cells in your skin. Common triggers include stress, heat, and sweat. Do your best not to scratch.

Food to avoid-

1. Dairy products.

2. Gluten-containing foods: Gluten, found in wheat, barley, and rye, can be a potential trigger for some people with PN. Switching to gluten-free alternatives may provide relief.

3. Sugary foods: High sugar intake can exacerbate inflammation and itchiness.

4. Processed and fast foods: Processed foods high in trans fats and preservatives can worsen inflammation. Opt for fresh, whole foods instead.

5. Spicy foods.

6. Nightshade vegetables: Vegetables like tomatoes, potatoes, peppers, and eggplants belong to the nightshade family and can cause inflammation in some people.

7. Caffeine and alcohol: Both caffeine and alcohol can dehydrate the body and potentially trigger inflammation.

There is no way to prevent prurigo nodularis, but you can take steps to reduce itchiness, irritation and new PN flare-ups:

Avoid the sun or wear sunscreen with an SPF (sun protection factor) of at least 30.
Keep your fingernails trimmed short.
Stay out of hot environments and avoid activities that may cause sweating.

PN pathogenesis involves mutually reinforcing immune and neural dysfunction, fueled by an itch-scratch cycle, which leads to aberrant neurocutaneous anatomical changes, chronic pruritus, and skin lesion development. Dupixent is a prescription medicine used to treat adults with prurigo nodularis (PN).

Expert opinion: Nemolizumab is a promising drug for PN that seems comparable to the recently approved Dupilumab in terms of its therapeutic effect and excellent safety profile, although Nemolizumab may work more rapidly on itch. PN is associated with an increased risk of chronic kidney disease, diabetes, hepatitis C, HIV (expand), and several psychiatric comorbidities. Clinicians should be aware of associations with psychiatric, metabolic, and infectious diseases when treating patients with PN.

I hope this helps.

Kindly follow up if you have more concerns.

Thank you.