Symptoms are indicating acute mild orchitis.
Wear loose fitted trousers, lower, inner garment.
Next Steps
Start with following Homeopathic medicine:
(1). R - 1 ( 10 drops 4 times a day in 15 ml of normal RO Water) for 7 days.
(2). Rhododendron Q 2 drops thrice daily in 30 ml of normal RO Water for 7 days.
(3). Hamamelis Q 2 drops thrice daily in 30 ml of normal RO Water for 7 days.
Health Tips
Review after 7 days, You can consult me in person online through Practo Consult.