Winter dryness vs actual skin problems

Hey everyone. Sparrow (my 5yo Siamese) has started getting these little dry patches on her back. It's winter here so I assumed it was just the heater drying out the air, like in Winter dryness tips. But Willow (my 2yo Ragdoll) is fine, and she sleeps right next to Sparrow. Is this just seasonal or should I be worried? I've been brushing her more, but the patches aren't going away.

If it's just dryness, both cats should be affected similarly since they share the same environment. The fact that only Sparrow has issues suggests it might not be environmental. Check if the patches are itchy. If she's scratching or licking them excessively, it's likely a skin condition, not just dryness. See Call the vet if you see this for signs that need immediate attention.

Gentle reminder that Siamese can be more sensitive to temperature changes than other breeds. I had similar issues with Cleo (my 9yo gray) last winter. We used a humidifier in her room. Check Heating and humidity levels for the right settings. Also, make sure she's not allergic to anything new in her diet. Is it the food or the weather? has some good pointers on that.

Mittens (14yo gray shorthair) gets dry skin every winter. It's usually just the heating. I keep the humidity around 40%. If it's not improving with humidity, it's probably not just dryness. See Whiskers' skin changes after joint supplement for cases of non-environmental causes.

My three tuxedos (Ink, Spot, Mochi) never have dry skin issues, even in winter. I think it's breed-dependent. Siamese might just have thinner skin? I've seen White flakes on Smokey's back where the cat had glaucoma meds causing skin changes. Could Sparrow be on any meds?

No meds for Sparrow. She's healthy otherwise. I did check the humidity and it's around 30%, so maybe I need to increase it. But the patches are only on her back, not her belly or legs. That's what worries me. If it was just dry air, wouldn't it be all over?

Localized patches are a red flag. Dryness affects the whole body evenly. If it's just on her back, it could be a fungal infection, hot spot, or even early-stage allergies. Don't wait for it to spread. If you see any crusting, hair loss, or if she starts licking it raw, call the vet today. Call the vet if you see this covers the specifics. I'd recommend a skin scrape to rule out mites or fungi.

Agree with Steve. Localized is key. I'd also check if she's been in the yard or around other cats recently. Is it the food or the weather? is less relevant here if it's localized, but worth ruling out if it spreads. Keep an eye on it for a few days. If no improvement with increased humidity, it's time for a vet visit.