Costochondritis is inflammation where your ribs join your breastbone. It causes sharp pain in the middle of your chest.
The main symptom of costochondritis is sharp chest pain that's worse when moving and breathing.
It's not exactly clear what causes costochondritis. It's been linked to severe coughing, chest injury and strain from exercise.
Costochondritis often gets better after a few weeks. Resting, holding a warm cloth to your chest and taking painkillers can help while it heals.