Hello,
From the symptoms it can be balanoposthitis. Oral course of antibiotics is needed. In addition, please don’t use any cosmetics on the penis, instead use some topical antimicrobials like Bacitracin or Lotrimin.Also corticosteroids and topical immunosuppressants can be used but they are available under prescription. Also retract the foreskin daily and soak in warm water to clean penis and foreskin. In case the symptoms persist then please consult a urologist/dermatologist for evaluation and antimicrobials and steroids prescription.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
same happened to me the redness lasted 1.5 years until tired of medications and creams that don't heal anything I went ahead with a circumsicion surgery and that solved everything. Make an appointment with an urologyst he'll give you a better advice. Good luck