If testosterone is not injected into the muscle, it may not be effectively absorbed and utilized by the body. This can lead to reduced therapeutic efficacy, potentially affecting testosterone levels, muscle growth, and overall treatment outcomes. Incorrect injection methods, such as subcutaneous injections or transdermal delivery, can cause complications like abscess formation, infection, or nerve damage. Therefore, it is crucial to follow proper intramuscular injection techniques, use sterile equipment, and consult with healthcare professionals for guidance.