Short answer · Medically reviewed summary · Last updated: 2026-05-08
Rickets is a childhood bone disorder characterized by the softening and weakening of bones, primarily caused by an extreme or prolonged deficiency of vitamin D, calcium, or phosphate. By preventing proper mineralization of the skeleton, Rickets leads to skeletal deformities, such as bowed legs and stunted growth, before the growth plates close. What causes Rickets to develop? The primary mechanism behind Rickets is an impaired ability to mineralize the growth plate cartilage.
What is Rickets
What is Rickets? Plain-language, medically reviewed definition plus the lived reality told by patients.
Rickets is a childhood bone disorder characterized by the softening and weakening of bones, primarily caused by an extreme or prolonged deficiency of vitamin D, calcium, or phosphate. By preventing proper mineralization of the skeleton, Rickets leads to skeletal deformities, such as bowed legs and stunted growth, before the growth plates close.
What causes Rickets to develop?
The primary mechanism behind Rickets is an impaired ability to mineralize the growth plate cartilage. While nutritional deficiency is the most common cause globally, other forms of Rickets are genetic. In these hereditary cases, such as X-linked hypophosphatemic Rickets, the body struggles to maintain proper phosphate levels in the blood, which is essential for bone hardening.
Which body systems are affected by Rickets?
Because Rickets impacts the skeletal system during critical growth phases, the effects are widespread. Common signs include:
- Skeletal deformities: Bowed legs or knock-knees, thickening of wrists and ankles, and projection of the breastbone (pigeon chest).
- Dental issues: Delayed tooth formation and defects in tooth enamel.
- Muscular weakness: Decreased muscle tone and delayed motor development.
- Growth impairment: Short stature compared to peers of the same age.
How common is this condition?
Nutritional Rickets remains a global public health concern, particularly in regions with limited sunlight exposure or restricted diets. While the prevalence of nutritional Rickets varies significantly by geography and socioeconomic status, genetic forms are much rarer; for instance, X-linked hypophosphatemia has an estimated prevalence of approximately 1 in 20,000 to 1 in 60,000 people. At DiseaseMaps.org, we currently support a small community of individuals navigating these challenges.
How is Rickets differentiated from other bone conditions?
Unlike osteoporosis, which involves the loss of bone mass in adults, Rickets specifically affects the growing skeleton of children. It is distinguished from other metabolic bone diseases through blood tests that measure serum calcium, phosphate, alkaline phosphatase, and parathyroid hormone levels, alongside radiographic imaging that shows characteristic "cupping" or fraying at the ends of long bones.
Next steps
- Consult a pediatric endocrinologist or a metabolic bone specialist for a formal evaluation.
- Request blood panels to check levels of vitamin D (25-hydroxyvitamin D), calcium, and phosphorus.
- Connect with others by joining the community at DiseaseMaps.org to share experiences and coping strategies.
Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment.
References
- NIH Genetic and Rare Diseases Information Center (GARD): Rickets Overview.
- Orphanet: Rare Bone Diseases Database.
- OMIM (Online Mendelian Inheritance in Man): Clinical summaries on Vitamin D-Dependent Rickets.
- UpToDate: Clinical manifestations and diagnosis of Rickets in children.
