It seems that you are having balanoposthitis
It may be candidal balanoposthitis.
It is fungal infection
It caused by candida albicans.
The fungus from female partner spreads to you after intercourse.
The skin of glns and prepuce , become red,wet and erosed.
There is mild to severe burning.
Anti fungal tablets and cream for few days will improve.
Give anti fungal tab. to your partner also.
Take Sitz bath in dettol
Take immunobusters to imorove immunity.
Rule out DM, HIV and other diseases after blood investigations.Consult dermatologist
I hope you got my answer.
Dr. Ilyas Patel MD