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Fatigue and Abdominal Pain Overview

May 7, 2025

Fatigue and Associated Conditions

Fatigue with Hypothyroidism

  • Symptoms:
    • Fatigue, decreased energy, dizziness
    • Hair loss, constipation, weight gain
    • Dry skin & brittle nails, pallor
    • Insomnia, depression, cold intolerance
    • Irregular menses, decreased exercise tolerance
    • Shortness of breath (SOB) on exertion, hoarseness
    • Sleep apnea due to macroglossia
    • Weakness, cramps, myalgias
    • Brain fog, thinning of lateral third of eyebrow
  • General/Vitals: Bradycardia, hypertension (HTN), low temperature
  • Labs:
    • CBC, CMP, Lipid Panel, TSH, free and total T3 and T4, Anti-TPO and/or Thyroglobulin Ab, rT3
  • Imaging/Referrals:
    • Fine-needle aspiration biopsy if nodules suspected
  • Lab Findings:
    • Refractory macrocytic or normocytic anemia, hypokalemia, increased LDH, elevated CPK, elevated cholesterol, LDL, and TG
    • Elevated TSH, low fT3/fT4, decreased rT3, elevated Anti-TPO/Thyroglobulin Ab

Fatigue with Adrenocortical Insufficiency

  • Symptoms:
    • Fatigue, high stress, flat affect emotionally
    • Weight loss, salt cravings, GI symptoms (alternating constipation and diarrhea)
    • Decreased sex hormones (decreased libido, erectile dysfunction, cycle abnormalities in females)
  • Vitals: Hypotension (especially orthostatic), hyperpigmentation
  • Labs:
    • Fasting CMP (hyponatremia, hyperkalemia, hypoglycemia)
    • Fasting AM serum cortisol (low), Salivary cortisol X4 (low total daily)
    • ACTH stimulation test

Fatigue with Major Depressive Disorder

  • Symptoms:
    • Decreased interest/apathy, fatigue, flat affect
    • Hyperinsomnia, weight gain, suicidal ideation, stress, decreased appetite
  • Labs: CBC, TSH, Vit D, B12, CMP, Salivary cortisol, ACTH stimulation test
  • Assessment: PHQ9 questionnaire

Fatigue with Mononucleosis

  • Symptoms:
    • Fatigue/malaise, headache, sore throat, swelling around neck
    • Fever, temperature fluctuations
  • Labs: CBC, CMP w/LFT, Rapid Strep, Monospot test, EBV titer
  • Imaging/Referrals: Abdominal US if splenomegaly, possible hepatomegaly

Fatigue with Anemia

  • Symptoms:
    • Fatigue, weakness, dizziness, dyspnea on exertion
    • Pallor, palpitations, brittle nails, pruritis (Fe Def)
  • Labs: CBC w/differential, CMP, Ferritin, Serum Iron, TIBC, Serum B12, Serum folate, TSH
  • Imaging/Referrals: Colonoscopy, Peripheral blood smear

Abdominal Pain and Associated Conditions

Abdominal Cancer

  • Symptoms:
    • Abdominal pain, mass in abdomen, anorexia, weight loss, night sweats
    • Jaundice (possible Liver cancer)
  • Labs: CBC, CMP w/ LFT, FOB, CEA
  • Imaging/Referrals: EGD with biopsy, CT or MRI

Diverticulitis

  • Symptoms:
    • Intermittent abdominal pain (LLQ), mass, rigidity, constipation
    • Fever, nausea/vomiting, loose bowel movement, blood in stool
  • Labs: CBC, CMP, Lipase/Amylase, CRP, UA, FOB
  • Imaging/Referrals: Abdominal CT, Colonoscopy

Appendicitis

  • Symptoms:
    • RLQ pain, dull abdominal discomfort, fever, chills, anorexia
  • Labs: CBC, UA
  • Imaging/Referrals: Abdominal CT with contrast

Acute Pancreatitis

  • Symptoms:
    • Intense epigastric pain, N/V, anorexia, fever
  • Labs: CBC, CMP, Amylase, Lipase, Lipid Panel, CRP
  • Imaging/Referrals: Abdominal US

Acute Gastritis

  • Symptoms:
    • Epigastric pain, burning, gnawing pain
    • N/V, possible hematemesis, melena
  • Labs: CBC, CMP, H. pylori, Serum MMA, Homocysteine, B12, FOB
  • Imaging/Referrals: Upper Endoscopy & biopsy

Gastric Ulcer

  • Symptoms:
    • Gnawing/burning epigastric pain, worse with food, better with antacids
    • N/V, early satiety, anorexia/weight loss
  • Labs: CBC, CMP, H. pylori testing, FOB, Amylase
  • Imaging/Referrals: Endoscopy

Duodenal Ulcer

  • Symptoms:
    • Gnawing/burning epigastric pain, better initially with food
  • Labs: CBC, CMP, H. pylori, FOB, Amylase
  • Imaging/Referrals: Endoscopy

Hepatitis

  • Symptoms:
    • RUQ pain, jaundice, nausea, vomiting, pruritis
  • Labs: CBC w/ diff, CMP w/ LFT, Acute viral hepatitis panel
  • Imaging/Referrals: Ultrasound (US)

Cholelithiasis w/ Cholangitis

  • Symptoms:
    • RUQ pain, jaundice, nausea, reduced appetite
  • Labs: CBC w/ diff, CMP w/ LFT, Amylase/lipase assay
  • Imaging/Referrals: Transabdominal US

Cholelithiasis

  • Symptoms:
    • Sharp RUQ pain, Anorexia, N/V
  • Labs: CBC, CMP w/ LFT, Lipase/amylase, UA
  • Imaging/Referrals: Abdominal US, HIDA scan

Acute Cholecystitis

  • Symptoms:
    • Sharp or aching RUQ pain, nausea/vomiting, jaundice, fever
  • Labs: CBC w/ diff, CMP w/ LFT, Amylase/lipase assay, U/A
  • Imaging/Referrals: RUQ US

Cirrhosis

  • Symptoms:
    • RUQ pain, nausea, jaundice, fatigue
  • Labs: CBC w/ diff, CMP w/ LFT
  • Imaging/Referrals: Transabdominal US