Hai,
Based on your symptoms and the age of father, most probably it will be hernia or hydrocele. It should be taken as serious because if it is hernia, it has a chance of getting strangulation.
Only,after detail physical examination, usg and blood test we can proove that it is herina or hydrocele or any other.
Next Steps
so,consult a surgeon and treat as soon as possible.
Health Tips
Avoid heavy weight lifting.
Treat respiratory infections like cough because it will increase hernia.
Include more fibre content in diet to avoid constipation.