2 day old baby body rash is growing 😭

Hey guys someone please help me. Baby’s back, legs and cheeks covered in red blotches with white and yellow redheads. They get worse with heat but don’t seem to go away. What are they and what can I do? Thank you

UPDATE: thank you for the concern guys! Spoke to midwives and just washed with water. Someone recommended using nipple ointment and breast milk too. It’s gone down so much now, no redness, just small bumps! Happy momma here