Hi, 
1. Infection of penis that is persisting is indicative for:
- lack of success of previous infection
- a culture of pus coming from penis is recommended to determine the type of microbe causing the infection and appropriate antibiotic to fight it correctly
- apart local hygiene and medications, you should be use 
oral antibiotics for long time
- should avoid sexual intercourse until improvement
- if not circumcised, please discuss with 
urologist to get 
circumcision as definite treatment
- get your partner tested  and treated adequately too
2. If treated correctly, it won't get again arise
3. You can continue as advised by your urologist. However, systemic/oral treatment is highly recommended
4. You can ask your physician to refer to the urologist in hospital and get a more specialized medical attention there. 
Hope it was of help!
Dr.Albana