I have been diagnosed with fungus feet. I soak my feet into warm water for 15-20 minutes, then put on an anti-fungi cream prescribed to me by my podiatrist. Visible relief immediately.
My father used to get bad foot fungus, he wore steel toe boots all the time so his feet couldn't breath properly and they would be sweaty all the time. That's how he got his. Foot fungus is actually quite common. Hopefully it'll go away soon Naiwen!