Adult Rickets Symptoms and What They Point To

Rickets is commonly thought of as a childhood disease, but adults can develop a form of it too. In adults, this condition is often called osteomalacia, though many people still refer to it as rickets. Understanding rickets in adults symptoms can help you recognize potential warning signs and seek timely care.

What Is Adult Rickets?

Adult rickets (osteomalacia) is a softening of the bones due to defective bone mineralization. Unlike osteoporosis, which thins bones, osteomalacia prevents the normal hardening of the bone matrix. The most frequent culprit is vitamin D deficiency, but low phosphate or calcium levels and certain medical conditions can also play a role.

Credible sources such as the National Institutes of Health (NIH), World Health Organization (WHO), and peer-reviewed medical journals all highlight the importance of vitamin D, calcium, and phosphate in maintaining healthy adult bones.

Why It Happens

Several factors can lead to rickets in adults:

• Vitamin D Deficiency
  • Inadequate sun exposure (especially in higher latitudes or with heavy sunblock use)
  • Poor dietary intake (diets low in fatty fish, fortified foods, eggs)
  • Malabsorption disorders (celiac disease, Crohn’s disease, certain surgeries)

• Calcium or Phosphate Imbalance
  • Low dietary calcium
  • Kidney disease affecting phosphate handling
  • Genetic disorders (e.g., hypophosphatemic rickets)

• Medications and Medical Conditions
  • Long-term anticonvulsants or antifungal use
  • Liver disease (impaired conversion of vitamin D to its active form)
  • Certain cancers or hormonal disorders

Key Rickets in Adults Symptoms

Early signs can be subtle and develop over months. Look out for:

• Bone Pain and Tenderness
  • Deep, aching pain in the hips, lower back, pelvis, and legs
  • Worse at night or with weight-bearing activities

• Muscle Weakness
  • Difficulty climbing stairs or rising from a chair
  • Generalized fatigue in the proximal muscles (hips and shoulders)

• Frequent Fractures
  • Stress fractures in the ribs, femur, or wrist
  • “Painless” fractures found incidentally on X-rays

• Skeletal Deformities
  • Bowing of the legs (genu varum)
  • Widening of wrists and ankles
  • Pelvic deformities that may complicate childbirth

• Dental Problems
  • Delayed tooth eruption
  • Weak enamel, cavities, or abscesses

• General Symptoms
  • Muscle cramps
  • Numbness or tingling in the hands and feet (if calcium is very low)
  • Mood changes or depression (linked to vitamin D’s role in brain function)

What These Symptoms Point To

Recognizing these signs helps pinpoint underlying issues:

• Bone Pain & Fractures → Poor bone mineralization, often from vitamin D or phosphate deficiency.
• Muscle Weakness & Cramps → Reduced calcium available for muscle contraction; vitamin D supports muscle function.
• Skeletal Deformities → Long-term mineral deficiency disrupting normal bone growth and remodeling.
• Dental Issues → Enamel formation depends on adequate calcium and phosphate; vitamin D aids absorption.
• Neuromuscular Signs → Severe hypocalcemia causing nerve hyperexcitability.

If you notice a combination of bone pain, weakness, and unusual fractures, these are red flags for osteomalacia and warrant medical evaluation.

How Rickets in Adults Is Diagnosed

A thorough workup typically includes:

1. Medical History & Physical Exam
   • Sun exposure, diet, medication use
   • Musculoskeletal exam for tenderness, deformities, and gait abnormalities

2. Blood Tests
   • 25-hydroxyvitamin D (best measure of vitamin D status)
   • Calcium, phosphate, parathyroid hormone (PTH)
   • Alkaline phosphatase (often elevated in osteomalacia)

3. Urine Tests
   • Calcium and phosphate excretion rates

4. Imaging
   • X-rays: Looser’s zones (pseudofractures) or cortical thinning
   • Bone density scan (DXA) to differentiate from osteoporosis

5. Additional Studies (if indicated)
   • Endoscopy or imaging for malabsorption
   • Genetic testing for inherited disorders

Treatment and Management

Addressing both symptoms and root causes is key:

• Vitamin D Supplementation
  • High-dose vitamin D3 (cholecalciferol) or D2 under medical supervision
  • Maintenance doses once levels normalize

• Calcium and Phosphate Intake
  • Dietary sources: dairy, leafy greens, fortified cereals
  • Supplements if dietary changes aren’t enough

• Treat Underlying Conditions
  • Manage celiac or Crohn’s disease to improve nutrient absorption
  • Adjust medications that interfere with vitamin D metabolism

• Sunlight Exposure
  • Short daily exposure (10–30 minutes) to arms and legs, depending on skin tone and latitude
  • Balance skin cancer risk by avoiding sunburn

• Physical Therapy
  • Strengthening exercises to rebuild muscle mass and improve balance
  • Low-impact activities (swimming, cycling) to reduce fracture risk

• Regular Monitoring
  • Repeat blood tests and imaging every 3–6 months until stable
  • Ongoing bone density assessments to track improvement

Preventing Adult Rickets

Even if you’ve never had osteomalacia, these steps can help protect your bones:

• Ensure a diet rich in vitamin D, calcium, and phosphate
• Get moderate sunlight exposure several times per week
• Consider fortified foods or supplements if diet alone is insufficient
• Discuss any risk factors (medications, medical conditions) with your healthcare provider

When to Seek Help

If you experience persistent bone pain, unexplained muscle weakness, or fractures, it’s important not to ignore these signals. You might consider a free, online symptom check, using the doctor approved Ubie Symptom Checker to get guidance on next steps.

Above all, speak to a doctor about anything that could be life threatening or serious. Early diagnosis and treatment of rickets in adults can prevent complications, improve quality of life, and ensure your bones stay strong well into later years.