Itchy armpits

There’s a medicated talc called Desenex that contains 2% miconazole nitrate that works very well for yeast infections that cause itching and smells quite pleasant.

It's not actually legal to suggest anything if you're not qualified prescriber (because so many other things need to be taken into account, such as pre existing conditions or drugs already been taken.
But I can tell you that I treat occasional flare ups which are often yeast based with Vicks vapour rub. I also find using bamboo and/or charcoal pads helps keep the skin dry and restricts bacteria growth.

Seajaye

Use unscented shower gels or body wash made for babies. Don't use talc or deodorants for a while. Aveeno lavender and camomile wash is lovely as shower gel if you want a scented product which is skin sensitive.

Check for any other internal triggers such as food intolerances. Wheat gluten makes the whole of my torso itch.

I use an Aveeno Baby wash and it's sorted out most the itchy bits on my sensitive skin.
It's interesting that you mention gluten, there are many coeliacs in my family. I've had two tests at the GP, one years ago which said I was moderately allergic and another recent ne which said I wasn't!

Yes I have had this problem for quite a while. Apparently it is a yeast infection and tends to be happen in warm moist areas/skin folds - hence armpits, beneath breasts, etc. I was prescribed a cream called Daktarin which helps when I get it from time to time.

My husband suffered from itchy armpits. He now uses deodorant with 0% aluminium and that has solved the problem. There are several makes that do them Sure 0% being one. Hope this helps.

Use unscented shower gels or body wash made for babies. Don't use talc or deodorants for a while. Aveeno lavender and camomile wash is lovely as shower gel if you want a scented product which is skin sensitive.

Check for any other internal triggers such as food intolerances. Wheat gluten makes the whole of my torso itch.

Caneston cream seems to be effective.

I had a rash under my breasts, not the usual sweat rash that can appear. Dr prescribed Trimovate (cortisone/antifungal/antibiotic) following a telephone appointment. It calmed things a little but didn't clear it up. After two weeks I showed my Dil who is a nurse. She advised my to wash the area twice daily using Fairy Antibacterial washing up liquid. Make sure the area is absolutely dry and then use the prescribed ointment. It worked. To make sure I was perfectly dry I used the hairdryer on a cool setting.
After applying the ointment I lay down with the area exposed for twenty minutes to let it sink in. Only then get dressed.
Note: my dil's father is a farmer and to keep his byres etc clean and his cow's udders healthy this is all he would use. She learned this from him.

Thank you all for your suggestions. I will try them.

Ask for Daktacort at the pharmacy. It's antifungal and hydrocortisone. Clears my under boob itch up in no time.

I use a little bit of hydrocortisone cream and it clears up in a couple of days.

I sometimes get an itchy fungal infection between and under my breasts in hot weather. This responds to Canesten athlete's foot cream, recommended by pharmacist. Could this be your problem?

Bicarbonate of soda, Thanks Hetty I will try that.

I have many allergies - but I can use the Fussy deodorant (seen on Dragon's Den) if I'm out for the day, in hot weather. Mostly, though, I don't use it as I wash with diluted bicarbonate of soda, then rinse well. My armpits never smell.

Have you thought about reactions to something you wash with - or wash your clothes in? My late husband had reactions to starch in new clothes (so everything had to be washed first) and fabric conditioner.

I’d be wary using talcum powder. Try Cuticura if you must, it’s medicated but use sparingly and don’t inhale the powder. I agree with BB - try nothing for a while.

Just a thought, try using nothing