After a shower, my forehead gets so dry and flaky and it does get redness too. I have the same thing on my scalp like bumps of dead skin. Any help?

See doctor. to get diagnosis and treatment, Can try nizoral (ketoconazole) shampoo OTC till appointment.Make sure you rinse all shampoo from the scalp.
Could be psoriasis. eczema, or dandruff, need to see a dermatologist for absolute diagnosis and treatment.