The minor side effects of steroid use include acne, oily skin, excess hair growth, and deepening of the voice. The major side effects of steroid use include an increased risk of cancer, increased risk of heart and liver disease, jaundice, fluid retention, reduction in HDL-C (“good cholesterol”

, high blood pressure, changes in blood coagulation, increased risk of atherosclerosis, swelling of the soft tissues of the extremities (edema), and obstructive sleep apnea.
Side effects specific to men can include testicular atrophy or the shrinking of the testicles, reduced sperm count, infertility, baldness, and the development of breasts. For women, side effects can include enlargement of the clitoris, changes in the body contour growth of facial hair, disruption of the menstrual cycle, deepened voice and infertility.
An increase in androgenic (male) hormones may also lead to aggressive behavior. Research also indicates that steroid users often suffer from paranoid jealousy, extreme irritability, delusions, and impaired judgment stemming from feelings of invincibility..