Hello from null

Hi everyone. I am female over 55 years of age. I had intensive head and neck radiation 64 one hour session in total due to cancer. The skin around my mouth has deep lines. I could not use any products as everything burned. My skin has recovered but I have red irritation on my forehead and cheeks. No pimples, blemishes or scaring just red like I have blush on. Grateful to be alive but would like to reduce the deep lines. Any suggestions?