Signs and symptoms of rickets can include: 
Delayed growth
Delayed motor skills
Pain in the spine, pelvis and legs
Muscle weakness
 Because rickets softens the areas of growing tissue at the ends of a child's bones (growth plates), it can cause skeletal deformities such as: 
Bowed legs or knock knees
Thickened wrists and ankles
Breastbone projection
 When to see a doctor Talk to your doctor if your child develops bone pain, muscle weakness or obvious skeletal deformities.