Hypothyroidism with high TSH levels can affect many body functions and may lead to tiredness, depression, poor concentration, memory issues, constipation, weight changes, and sexual problems because the body’s metabolism becomes slower. Fast heartbeat and hand shaking may sometimes happen due to stress, anxiety, medicine imbalance, or other hormonal disturbances, so a proper review of symptoms and thyroid reports is important. Treatment usually focuses on balancing thyroid hormone levels and improving overall physical and mental health. Taking thyroid medicines regularly at the correct time, maintaining proper sleep, stress reduction, regular exercise, and balanced nutrition may help improve energy and concentration gradually. Poor sleep and emotional stress can further worsen mood, tremors, and sexual health. Avoid changing or stopping thyroid medicines on your own because irregular treatment may worsen symptoms over time. Consult your doctor for repeat thyroid testing and evaluation of heartbeat changes, tremors, depression, and sexual problems so the treatment plan can be adjusted properly.