My scalp is red and splotchy in some places. no itching, raised bumps etc. noticing a lot more hair falling out than usual. what is wrong?

Hair loss: First...bloodwork should be done by your primary care physician. Your thyroid could be off (hypothyroidism) and this can lead to hair loss and skin changes. Vitamin and mineral deficiencies can also cause skin issues. Ultimately you will likely see a dermatologist, but going through your PCP first is the way to go so you don't put the cart in front of the horse!