Went to park the next day I randomly got multiple red puffy bites on my legs very itchy. Now they have a white head. What could it be? Its been 2 days.

Bites . Insect bites are typically red itchy bumps. White heads imply a folliculitis or inflammation/ bacterial infection of the hair follicles . Corticosteroid cream for a few days to relieve itch and an antibacterial such as polysporin (bacitracin and polymyxin) may help. If the condition does not improve , see a dermatologist for evaluation and treatment.