How do I get rid of severe. Jock itch?

OTC vs RX. The questions is...Over the counter or precripton. Over the counter products are fairly good - creams, powders, and sprays. However, they sometimes do not kill the specific fungus. If 2 weeks of use does not clear it up, try a different product. Still not working....Get a prescription. Also, keeping the area clean, dry, and cool as possible is essential.
OTC treatment. Agree with Dr. N. You should try over the counter anti-fungal cream. If that does not resolve the matter in a week or so, it would be prudent to see a doctor.
Have a healthy diet, exercise, drink plenty of water, have safe sex, and get HPV vaccine. Wish you good health!