Shaping a preemie head ??

My son mom was born at 30 weeks to the exact when born he had a normal head shape but he had to be put on CPAP right after birth and was on it for about 10 weeks now his head is long and narrow .. also his hair has also fallen out .. will his head be like this forever when will it change ?? It just makes me kinda nervous his head looks weird ?? What can I do to change it back to its normal shape ??