Carisma,
This is the hardest part for a parent...when the nurses poke multiple times to get a vain. Few things that helped when our daughter was 2 to 3 months old were - keeping her hydrated, making her drink milk before leaving the house, keeping her hand wrapped with gloves or cloth to keep it warm and veins easily visible. After she turned one, getting a single poke got easier and I believe you will also see that. For the rashes, it could be Tx reaction. Here in Boston, little E always gets a dose of benadryl before TX starts to reduce Tx reaction. You could ask your hemo about it too. Best of luck and believe me , it will get easier as little Ari grows up.