Discover the types of steroid injections, their benefits, side effects, and suitability. Learn from Boston Concierge Orthopedics experts. Steroid treatment for arthritis and related conditions can be taken as tablets or given as injections into the affected area. Steroid injections are often recommended for people with rheumatoid arthritis and other types of inflammatory arthritis. Keloid Steroid Treatment When it comes to treating keloids, corticosteroid injections are a common choice. These injections contain powerful anti-inflammatory medication that helps reduce the size and appearance of keloid scars. The steroids work by suppressing the body's immune response in the affected area, ultimately leading to a decrease in scar tissue formation. Cortisone Sod 100mg Injection is a steroid which works by blocking the production of certain chemical messengers in the body that cause inflammation (redness and swelling) and allergies.