Are these red rashes or insect bites?

Hi all, we went out today. My little one wore a pants that is over-the-knee length, the length reaches about the middle of her calf. When we came back we saw that she have these red spots, even at her upper thighs above the knee (which was supposed to be covered by her pants). We are mostly indoors today don’t think I see any mosquitoes, so I’m perplexed how she could have so many red spots that seem like mosquito/insect bites… may I know what could have caused these? Or is she sensitive to certain materials? There is one red patch at her right foot too. Not sure if this is caused by the materials on her baby stroller? Thank you in advance. #rash #redness #mosquitoes #insectbites