Re occurring rash on side of legs, now affecting my girlfriend too...

I have had a strange red rash on both sides of my legs for years now, i struggled to get rid of it with antibiotics - doctor said it was a fungal infection but after treatment it just came back, no matter what i try it comes back... I recently moved in with my girlfriend and now she has also developed the rash in the exact same place and blames me...

https://ibb.co/bvEYAS   link to picture of my legs

https://ibb.co/ndJtAS    link to picture of my legs

   

https://ibb.co/nN7Wx7   my girlfriend's leg...less developed but she says it burns