Steroids are a man-made version of chemicals, known as hormones, that are made naturally in the human body. They are designed to act like these hormones to reduce inflammation and are also known as corticosteroids, which are different from anabolic steroids used by bodybuilders and athletes. Steroids are used to reduce inflammation and ease symptoms such as swelling, pain, and stiffness. They are used to treat a range of conditions such as arthritis, asthma, autoimmune diseases, skin conditions, and some kinds of cancer. Steroids come in many different forms such as tablets, liquids, inhalers, nasal sprays, injections, creams, lotions, and gels. Most steroids are only available on prescription, but a few can be bought from pharmacies and shops. Steroids do not tend to cause significant side effects if theyre taken for a short time or at a low dose, but sometimes they can cause unpleasant side effects such as an increased appetite, mood changes, and difficulty. Steroids are strong medicines, and they can have side effects, including weakened bones and cataracts.