Hello,
Shiny red penis skin is not the symptom of penile cancer but can be due
to dermatitis
skin which is common after balanitis or due
to skin irritation. Your friend is right because at the delicate skin of penis, the topical steroid cream should be used with caution. It can cause skin thinning, skin atrophy or telangiectasia.
Wash the areas with fresh water. Do not use any cosmetic products at the sites. You can apply some calamine lotion at the rash as it will help in soothing the skin.