If you're fine-tuning a speech model, you've probably hit this wall: DNSMOS gives you a score, but it doesn't tell you whether the data behind that score is actually right for your model. 

Treat it as a pass/fail gate and you'll end up training on audio that looks clean on paper but drags down real-world performance—while good source data gets tossed for no reason.

Voices' CTO DJ Jalali (with the team's senior audio and voice data engineers) just published a free white paper that breaks down the four-step calibration framework they use internally to set model-specific quality thresholds instead of trusting the raw DNSMOS number. It also covers where DNSMOS breaks down and how Voices validates audio for custom datasets at scale.

Download the White Paper

Last issue we looked at contact dermatitis and the allergen hiding in the product the patient swears is safe. This issue the triggers are seasonal, and most of them are arriving in the next few weeks.

Autumn changes four things at once: the air gets colder and drier, the days get shorter, ragweed hits its peak, and the food on the table shifts. Each one has a specific, predictable effect on skin. Patients tend to blame the wrong one.

Roughly half of psoriasis patients report a seasonal pattern, and the most common direction is worse in autumn and winter. In one series of more than 2,500 patients, 53% reported aggravation in the colder months.

Ragweed releases pollen from early August until the first frost, peaking in mid-September. It is the main driver of the September asthma peak, and it is also the pollen behind autumn flares of atopic dermatitis and pollen-food allergy syndrome.

And in the 2023 AAAAI/ACAAI atopic dermatitis guideline, the panel recommended against elimination diets, because the benefit is small and uncertain while the risk of inducing a true food allergy is real.

Here is what each autumn trigger does, and what to do about it.

The effect

As outdoor temperature drops and indoor heating comes on, relative humidity falls. Low humidity increases transepidermal water loss, stimulates epidermal proliferation, and amplifies the inflammatory response to any barrier insult. The result is xerosis in almost everyone, asteatotic eczema (cracked, "crazy paving" plaques on the shins) in older patients, and flares in people with atopic dermatitis and hand eczema.

Practical tip

Three interventions cover most of it. Shorter, cooler showers with a non-soap cleanser. A thick emollient (ointment or cream, not lotion) applied within three minutes of bathing and again before bed. A humidifier in the bedroom. For atopic dermatitis patients with a known autumn pattern, restart proactive twice-weekly topical steroid or calcineurin inhibitor to previously affected sites before the flare, not after.

The effect

UV radiation is immunosuppressive in skin, which is why phototherapy works. When daily UV drops and clothing covers more of the body, that background suppression disappears. Psoriasis plaques that were quiet in August thicken by November. Seborrheic dermatitis follows a similar calendar and is worse in patients under stress or with poor sleep, both of which climb after the summer break.

Practical tip

For psoriasis patients with a documented autumn decline, this is the month to check that they have an adequate topical regimen at home, review whether they are candidates for phototherapy or systemic therapy, and get the referral in before the January waiting list. For seborrheic dermatitis, a ketoconazole or ciclopirox shampoo used two to three times a week (left on for five minutes, applied to face and chest as well as scalp) prevents most flares.

The effect

Ragweed pollen is an aeroallergen, and skin with a damaged barrier is a route of entry. In sensitized patients with atopic dermatitis, high pollen counts correlate with itch and flares, particularly on exposed skin: the face, eyelids, neck, and hands. Pollen and other airborne plant material (Compositae family, which includes ragweed and chrysanthemum) can also cause an airborne contact dermatitis with the same distribution, plus the upper eyelids and the area under the chin, which distinguishes it from a photodermatosis.

The food connection

Ragweed cross-reacts with foods in the melon and banana families. Patients sensitized to ragweed can develop pollen-food allergy syndrome (oral allergy syndrome) from raw melon, watermelon, cantaloupe, cucumber, zucchini, banana, and sunflower seeds: itching or tingling of the lips, tongue, and throat within minutes of eating. Mugwort, which pollinates in the same window, cross-reacts with celery, carrot, and spices. This is a mouth problem, not a skin problem. The proteins are heat-labile, so cooked versions are usually fine, and systemic reactions are uncommon but possible.

Practical tip

For atopic dermatitis patients whose face and hands flare every September, ask about hay fever. If present, the pollen is likely contributing: shower and change clothes after time outdoors, keep bedroom windows closed on high-count days, and consider a non-sedating antihistamine for the rhinitis (it will not treat the eczema, but it reduces scratching and rubbing of the eyelids). For pollen-food allergy syndrome, reassure, advise cooking or peeling the trigger, and refer to allergy if there is any history of throat tightness or systemic symptoms.

The effect

Autumn brings the season of comfort eating, holiday baking, and a wave of patients convinced that dairy, gluten, or sugar is causing their eczema. The evidence is clear on this and worth stating plainly.

The evidence

The 2023 AAAAI/ACAAI joint guideline reviewed ten randomized trials of dietary elimination for atopic dermatitis. Low-certainty evidence showed a possible small improvement (50% vs 41% reaching a minimal clinically important difference), and the panel judged that most patients would see little or no benefit. Against that, avoiding a food a patient is sensitized to but tolerating can convert sensitization into true IgE-mediated allergy, especially in infants. The guideline also found no benefit to test-guided elimination over empiric elimination, and specifically notes that screening with allergy tests to choose foods to eliminate has low yield and a high false-positive rate. IgG food sensitivity panels have no validated role.

What food does do to skin

True IgE food allergy causes hives, angioedema, and anaphylaxis within minutes to two hours, not chronic eczema. Cinnamon, vanilla, and other flavorings can cause contact cheilitis and perioral dermatitis, which is relevant to anyone baking through the holidays. Alcohol, hot drinks, and spicy food are well-documented flushing triggers in rosacea. Niacin-containing foods and supplements cause transient flushing. None of these is an elimination-diet problem; all are pattern-recognition problems.

Practical tip

When a patient asks whether a food is causing their eczema, ask two questions: Does the rash appear within two hours of eating it every time? Does it appear as hives or swelling rather than the usual eczema? If the answer to both is no, the food is not the driver, and you can say so. If yes, that is a possible IgE allergy and warrants proper allergy evaluation, not a home elimination trial. If the patient insists on trying elimination, the guideline suggests a structured n-of-1 approach (two weeks off, two weeks on, repeated three times, with a symptom score) and a time limit.

The effect

Separate from dryness, cold as a physical stimulus triggers its own conditions. Cold urticaria produces wheals within minutes of cold air, water, or objects, typically on rewarming. Chilblains (pernio) are tender red-purple papules on toes and fingers after damp cold, common in young women and often mistaken for infection or vasculitis. Raynaud phenomenon starts its season. And hand eczema returns as hand washing increases, gloves come out, and the barrier fails at the knuckles and fingertips.

The evidence

Among patients with a suggestive history, an ice cube test (five minutes on the forearm, observe for a wheal on rewarming) was positive in about 85%. Most respond to non-sedating antihistamines, sometimes at higher than standard dose. The important counseling point is swimming and cold water immersion, which can trigger systemic reactions in cold urticaria.

Practical tip

For suspected cold urticaria, do the ice cube test in clinic; it takes ten minutes and settles the question. Warn against cold-water swimming and cold showers. For chilblains, warm gradually, keep extremities dry, and look for the atypical patient (older, male, persistent lesions beyond three weeks) who needs a lupus and vasculitis workup. For hand eczema, the intervention is the same as for barrier failure above, plus cotton glove liners under any occlusive glove and a plain ointment at bedtime.

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Before autumn's triggers catch up with your patients, here's your quick-reference rundown:

Wishing you all a cozy, low-flare autumn ahead. See you next week!

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DERM Community | Derm for Primary Care Team