My daughters feet smell horrible she says she they sweat terrible we have tried so many things but nothings working what could cause this?

Sweat feeds bacteria: Surprisingly, your feet have a lot of sweat glands. Teenage girls are especially prone to excessive sweating due to hormonal changes. Key: never wear the same pair of shoes two days in a row. They need 24 hours to dry out. Also, dry feet well/in between toes after bathing, use foot deodorant or medicated insoles, "ventilated" socks, open-toed sandals when weather allows, barefoot at home.

Genetics & Bacteria: Having sweaty feet is a genetic trait & is common. Sweat itself lacks much odor but when combined with bacteria on the skin can be very smelly. Start by thoroughly washing feet & between toes daily with warm soap/water using a washcloth. Towel-dry especially between toes, air-dry for 5 min. Wear cotton socks & change when damp, use charcoal shoe inserts & change regularly, air out & rotate shoes.

Soak it: I would also recommend adding corn starch powders to her shoes and socks to absorb moisture. In addition, soaking feet in a mixture of vinegar (preferably apple cider vinegar) and water will reduce bacteria, fungus, and the overall smell feet in general. Do this about 4 time a week for 20 minutes