We Are Having Our House Remodeled , Sanding Texture Off

we are having our house remodeled , sanding texture off walls to smooth, tore up bath floors, repainting etc.
every time i go to check house i start bleeding on my arms from small holes that just appear. I will look down and spots of blood on my shirt.This happens after being in the house 30-45 minutes. Why and what is this ? I am allergic to oil base paint but they are not using oil base. Just latex low voc. I am now scared to walk in the house as it gets a little worse each time.