Thyroid Disorders (Hypothyroidism & Hyperthyroidism)

Thyroid disorders are common endocrine conditions that occur when the thyroid gland, located at the front of the neck, produces either too little or too much thyroid hormone. These hormones regulate metabolism, energy, and many vital body functions.

At The Medical Group of New Jersey, our internal medicine specialists diagnose and manage all forms of thyroid disease, including hypothyroidism, hyperthyroidism, and subclinical thyroid dysfunction. Early detection and proper management restore balance, energy, and metabolic health while preventing long-term complications.

Symptom Onset & Initial Evaluation

Thyroid disorders often progress slowly, and symptoms may mimic other conditions, making early detection challenging.

Hypothyroidism (Underactive Thyroid):

• Fatigue, weight gain, dry skin, and sensitivity to cold
• Constipation, depression, or menstrual irregularities

Hyperthyroidism (Overactive Thyroid):

• Nervousness, weight loss, heat intolerance, and tremors
• Rapid or irregular heartbeat, insomnia, or anxiety

During your evaluation at The Medical Group of New Jersey, your internist will:

• Review your full symptom history and family background.
• Examine the thyroid gland for enlargement or nodules.
• Screen for coexisting conditions such as Depression & Anxiety, Hyperlipidemia, or Obesity.
• Order thyroid blood tests to confirm diagnosis and establish baseline hormone levels.

Identifying thyroid imbalance early prevents complications and ensures timely treatment.

Diagnosis & Laboratory Testing

Thyroid disorders are diagnosed primarily through blood tests that measure hormone levels and gland function:

• TSH (Thyroid-Stimulating Hormone): The most sensitive indicator of thyroid activity
• Free T4 and Free T3: Assess circulating thyroid hormone levels
• Thyroid antibodies: Identify autoimmune causes such as Hashimoto’s thyroiditis or Graves’ disease

Your internist may also recommend:

• Ultrasound imaging: To evaluate nodules or structural changes
• Lipid and glucose screening: Detects metabolic effects of thyroid imbalance
• Cardiac evaluation: Especially in hyperthyroidism, where fast or irregular heartbeat may occur

These findings help determine whether the thyroid is overactive (hyperthyroidism) or underactive (hypothyroidism) and guide personalized treatment and monitoring.

Treatment & Long-Term Management

At The Medical Group of New Jersey, treatment is tailored to restore hormone balance and relieve symptoms.

Hypothyroidism

• Thyroid hormone replacement: Most patients take daily levothyroxine, a synthetic T4 hormone, to normalize TSH.
• Doses are adjusted gradually, with repeat labs every 6–8 weeks until stable.
• Lifestyle support includes balanced nutrition, adequate sleep, and weight monitoring.

Hyperthyroidism

• Antithyroid medications (e.g., methimazole or propylthiouracil) to block excess hormone production.
• Beta-blockers to control heart rate, tremor, and anxiety symptoms.
• Radioactive iodine therapy to reduce gland overactivity.
• Surgery (thyroidectomy) may be considered for large goiters, medication intolerance, or suspicious nodules.

Your provider monitors labs closely to ensure optimal hormone levels and prevent complications such as osteoporosis or cardiac arrhythmias.

Monitoring & Follow-Up

Regular follow-up visits are essential to maintain hormonal balance and adjust treatment as needed. At each visit, your internist will:

• Review your symptoms and medication adherence
• Recheck TSH and T4 levels every 6–12 months (more often when adjusting doses)
• Evaluate for medication side effects or signs of overtreatment
• Assess for related issues like Depression & Anxiety, Fatigue, or Weight Changes

If nodules or structural thyroid abnormalities are present, your care team may coordinate periodic ultrasound imaging and Endocrinology follow-up.

Prognosis & Preventive Care

Most patients achieve full symptom resolution with consistent treatment and monitoring.

Regular Preventive Health Screenings and wellness visits with your internist help identify thyroid dysfunction early and support whole-body health.

Women, older adults, and patients with autoimmune conditions or prior neck radiation benefit from periodic thyroid screening as part of preventive care.