What Are the Signs of Rickets in Babies?

Rickets is a condition that affects bone development in infants and young children, most often caused by a deficiency of vitamin D, calcium or phosphate. Understanding the rickets signs in babies can help you spot potential problems early, seek medical advice, and start treatment as needed. This guide covers common symptoms, what causes rickets, how it’s diagnosed and treated, and when to talk to your doctor.

What Causes Rickets?

Rickets develops when a baby’s bones can’t mineralize properly. Key causes include:

• Vitamin D deficiency
  • Limited exposure to sunlight (especially in areas with long winters)
  • Exclusive breastfeeding without supplementation (breast milk is low in vitamin D)
• Calcium or phosphate deficiency
  • Poor dietary intake of calcium-rich foods (e.g., fortified formula, dairy)
  • Certain medical conditions that affect absorption (e.g., celiac disease, kidney disorders)
• Genetic factors (rare)
  • Some forms of rickets are inherited and affect how the body processes vitamin D or minerals

Who Is at Higher Risk?

• Babies who are exclusively breastfed without vitamin D drops
• Infants with dark skin (more melanin reduces vitamin D production)
• Babies with limited sun exposure (living in northern latitudes or using excessive sunscreen)
• Babies with dietary restrictions or malabsorption syndromes

Common Rickets Signs in Babies

Rickets signs in babies can range from mild to more pronounced. Keep in mind that symptoms can develop gradually. If you notice any of the following, discuss them with your pediatrician.

1. Bone and Skeletal Changes

• Delayed growth
  • Your baby isn’t growing as quickly as expected on growth charts
• Soft, tender bones
  • Unusual softness when you gently press on the skull (called “craniotabes”)
• Delayed closure of fontanelles
  • The soft spots on top of the head stay open longer than normal
• Bowed legs or knock-knees
  • Legs that curve outward or inward when your baby starts to stand or walk
• Bone pain or tenderness
  • Fussiness when you move their arms or legs

2. Dental Problems

• Late teething
  • First teeth emerge later than the typical 6–12 month range
• Defective enamel
  • Teeth that chip or wear down easily once they come in

3. Muscle Weakness and Delays

• Delayed motor milestones
  • Slow to roll over, sit up, crawl or walk
• Muscle weakness
  • Floppiness or poor head control in newborns
• Frequent falls
  • Difficulty balancing when learning to stand or walk

4. Other Signs

• Increased irritability
  • Babies may cry more, especially when moved or picked up
• Sweating around the head
  • Excessive sweating, particularly on the scalp, which can be a subtle clue
• Fractures with minimal trauma
  • Bones that break more easily than expected

How Is Rickets Diagnosed?

If you observe any rickets signs in babies, your pediatrician will likely:

1. Review medical and feeding history
2. Perform a physical exam to check bone shape and muscle tone
3. Order blood tests to measure levels of:
   • Vitamin D (25-hydroxyvitamin D)
   • Calcium and phosphate
   • Parathyroid hormone (PTH)
4. Take X-rays of wrists, knees or long bones to view bone structure

Early diagnosis is important for starting treatment before deformities become permanent.

Treatment and Management

The goal of treatment is to correct mineral deficiencies and support normal bone growth.

• Vitamin D supplements
  • High-dose vitamin D taken orally as prescribed by your doctor
• Calcium and phosphate supplements
  • If levels are low, your doctor may recommend supplements or dietary increase
• Dietary guidance
  • Fortified formula for infants
  • Age-appropriate foods rich in calcium and vitamin D once solids are introduced
• Sunlight exposure
  • Safe, limited sun exposure (5–15 minutes a few times per week)
• Monitoring
  • Regular follow-up visits to monitor growth, blood levels and X-rays

With proper treatment, most babies show improvement within weeks to months. Bones usually regain strength and shape over time.

Preventing Rickets

You can lower your baby’s risk of rickets by:

• Providing vitamin D supplements
  • The American Academy of Pediatrics recommends 400 IU of vitamin D daily for all breastfed and partially breastfed infants, starting soon after birth
• Using fortified formula
  • If not exclusively breastfed, ensure formula provides adequate vitamin D and calcium
• Introducing a balanced diet
  • Once your baby starts solids (around 6 months), include foods like fortified cereals, dairy or dairy alternatives, pureed meats and beans
• Safe sun exposure
  • Expose bare skin (face, arms, legs) briefly to morning or late afternoon sun, avoiding peak UV hours

When to Seek Medical Advice

Some symptoms can be subtle, and early intervention is key. Consider a free, online symptom check, using the doctor approved Ubie Symptom Checker if you notice any of these warning signs:

• Persistent bowing of the legs or bowed arms
• Delayed milestones (rolling over, sitting, walking) by several months
• Unusual softness or indentation of the skull when touched
• Excessive fussiness or pain during movement

Always consult a healthcare professional about any concerns. If your baby shows signs of severe bone pain, fractures, or very delayed development, seek medical attention promptly.

Talking to Your Doctor

If you suspect rickets or any serious condition:

• Write down symptoms and questions before the appointment
• Bring growth records and feeding history
• Ask about blood tests, imaging and nutrition plans
• Discuss referral to a pediatric endocrinologist if needed

Never delay medical care for life-threatening or rapidly worsening symptoms.

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Understanding rickets signs in babies empowers you to act early. With proper nutrition, supplementation and medical support, most babies recover fully and go on to develop strong bones. If you have any doubts or notice potential signs, speak to a doctor right away.