Steroids are a group of medicines that help with a range of conditions in pets. They are most commonly used for reducing inflammation and managing the immune system.
If your dog has developed a big, swollen earflap, it’s most likely to be due to a condition called an aural haematoma. Treatment for a swollen ear will depends on the cause - contact your vet for an appointment.
Very minor wounds (cuts, grazes, burns, bites and bruises) often heal themselves. More serious wounds should always been seen by a vet.