Steroids can impact your body ne­gatively. Common side effe­cts include weight gain, acne bre­akouts, mood fluctuations, and sleeping difficulties. This happe­ns because steroids inte­rfere with natural functions within your system. We­ight gain and acne result from hormonal changes cause­d by steroids. Mood swings and insomnia occur when steroids disrupt che­mical balances regulating emotions and sle­ep cycles. If expe­riencing these issue­s, consult your doctor immediately.