Increased Head Circumference: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Increased Head Circumference?
A pediatrician usually finds and follows increased head circumference first. When the cause involves the brain or fluid around it, care often moves to a neurologist or a neurosurgeon. A gastroenterologist may be involved when feeding problems or vomiting are part of the picture in an infant.
What it is
Increased head circumference means a person's head is larger than expected for their age and sex. When the number is far above the normal range on a growth chart, doctors call it macrocephaly, which simply means a big head. Sometimes it is harmless, and sometimes it points to a problem that needs care.
Symptoms
Many people with a large head feel perfectly fine and have no other signs. In babies, doctors watch for a head that grows much faster than the rest of the body. Warning signs can include a bulging soft spot, unusual sleepiness, poor feeding, vomiting, or eyes that look downward.
Causes and who gets it
Common causes include a family tendency toward larger heads, called benign familial macrocephaly. Other causes include fluid buildup in the brain (hydrocephalus), bleeding, infections, and some genetic conditions. It is most often noticed in babies during routine checkups, and boys are affected slightly more often.
How doctors diagnose it
Doctors measure the head with a soft tape and compare the number to standard growth charts. They also track growth over time and check development. If there is a concern, imaging tests like ultrasound, CT, or MRI scans can show the brain and the fluid around it.
Treatment
Treatment depends on the cause. If the large head is a harmless family trait, no treatment is needed, just regular measurements to follow growth. If fluid is building up and pressing on the brain, a surgeon may place a small tube called a shunt to drain the fluid.
When to see a doctor
See a doctor if a baby's head seems to be growing unusually fast or if the soft spot bulges. Seek care quickly for vomiting, unusual sleepiness, constant crying, or eyes that look downward. Older children and adults should be checked for ongoing headaches, vision changes, or balance problems.
How a direct primary care or concierge doctor fits in
A direct primary care doctor is paid a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either one can measure head growth, compare it with growth charts, and follow the child closely. If the pattern looks like a harmless family trait, they can manage it with regular checkups, and if the exam raises concern, they will refer to a specialist.
Common questions
Is a big head always a problem?
No. Many people with larger heads are completely healthy, especially when the trait runs in the family. Doctors look at growth speed and development, not just one measurement.
Can a large head mean my child is very smart?
Head size does not predict intelligence. A large head can be a normal family trait, and it says nothing about how smart a child will be.
Will my child need surgery?
Most children with a large head never need surgery. Surgery is only considered when fluid is building up and causing pressure on the brain.
How often should a baby's head be measured?
Doctors usually measure head size at routine checkups during the first two years of life. If there is a concern, they may measure more often to track the growth pattern.
Sources
- NIH Genetic and Rare Diseases Information Center - Macrocephaly-spastic paraplegia-dysmorphism syndrome
- MedlinePlus - Increased head circumference: MedlinePlus Medical Encyclopedia
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
