Hello, Sir
Welcome to healthcaremagic.
I can certainly understand your concern.
I have worked through your query in detail.
As per your symptoms, the possibility of
fungal infection of penis is vey high.
Fungal infection is known to cause frequent itching and red blotches that can be quite resistant to treatment.
This could be unrelated to sexual activity sometimes and can develop in singular status.
Sometimes inadequate hygiene of the undergarments may lead to retention if moisture, that can lead to itching.
The pain killers related to
nerve and disc pain have no association with this pain.
A short course of oral and topical antibiotics ( antifungal) will help to improve your symptoms and reduce the itching.
Please check with your physician if he shares my view and if can prescribe these medications to you.
A 2 week course is extremely effective to prevent your symptoms.
Post your further queries if any.
Thank you