What are the common side effects of phototherapy in newborns?

Common side effects include: loose or watery green stools (due to increased bilirubin excretion), mild skin rash (usually harmless erythematous rash), increased fluid loss through the skin leading to dehydration risk, temperature instability (mild overheating or cooling), transient bronze discolouration of the skin in rare cases, and increased sleepiness. Most side effects are mild, temporary, and resolve once phototherapy is stopped.

What is bronze baby syndrome and is it dangerous?

Bronze baby syndrome is a rare condition where the baby's skin turns a dark greyish-brown (bronze) colour during phototherapy. It occurs almost exclusively in babies who have elevated conjugated (direct) bilirubin, usually due to liver disease or biliary problems. While the discolouration itself is not dangerous and resolves after phototherapy stops, it indicates an underlying condition that needs investigation. If you notice your baby's skin turning bronze or dark grey during treatment, inform your paediatrician immediately.

Can phototherapy cause dehydration in my baby?

Phototherapy increases insensible water loss through the skin by 20-40%, meaning your baby loses more fluid than usual. This increases the risk of dehydration if feeding is not increased to compensate. Signs of dehydration include fewer than 4-6 wet nappies per day, dark urine, dry mouth, sunken fontanelle, and lethargy. Prevent dehydration by breastfeeding every 2-3 hours and monitoring nappy output carefully. In Ahmedabad's hot climate, this is especially important during summer months.

Is the rash from phototherapy harmful?

Most phototherapy rashes are harmless and resolve within days of stopping treatment. Common types include a fine red rash (erythema), a transient macular rash, or mild heat rash. These do not require treatment and are not painful for the baby. However, if you notice blistering, severe redness, peeling skin, or a rash that worsens significantly, contact your paediatrician. Rarely, babies with certain conditions may have photosensitivity reactions that need medical attention.

Does phototherapy affect my baby's eyes?

Phototherapy light can damage the developing retina if the eyes are not properly protected. This is why opaque eye shields are always used during treatment. With proper eye protection, there is no risk of eye damage from phototherapy. Check the eye shields every 30 minutes to ensure they have not slipped. When removing shields during feeding breaks, check for eye discharge, redness, or swelling, and report any findings to your doctor.

Phototherapy Side Effects Guide Ahmedabad Parents

Understanding Phototherapy Side Effects

When your paediatrician prescribes phototherapy for your baby's jaundice, it is natural to worry about side effects. The good news is that phototherapy is one of the safest medical treatments used in newborns. It has been used worldwide for over five decades with an excellent safety record. However, like any medical treatment, it does have some side effects that parents should be aware of so they can monitor their baby and respond appropriately.

This guide, based on recommendations from the National Neonatology Forum (NNF) of India and the American Academy of Pediatrics (AAP), explains each potential side effect, how common it is, what to watch for, and how to manage it. We have included specific considerations for Ahmedabad families, particularly regarding the city's hot and dry climate.

Common Side Effects and How to Manage Them

1. Loose, Watery, or Green Stools

How common: Very common (affects most babies during phototherapy)

This is actually a sign that the treatment is working. Phototherapy converts bilirubin into water-soluble forms that are excreted through the stool. The bilirubin breakdown products give stools a greenish colour and looser consistency.

What you will see:

Stools may become watery or loose, sometimes appearing like diarrhoea
Greenish or dark green colour (from bilirubin breakdown products)
Increased stool frequency (4-8 times per day or more)

What to do:

This is normal and expected. Do not be alarmed.
Change nappies frequently to prevent nappy rash from the loose stools
Apply a barrier cream (zinc oxide or petroleum jelly) to the nappy area
If the stools are truly explosive or contain mucus or blood, contact your paediatrician
Increase breastfeeding frequency to compensate for fluid loss through stools

2. Skin Rash

How common: Common (affects 20-30% of babies)

Various types of skin rash can occur during phototherapy, most of which are harmless and temporary.

Types of phototherapy-related rash:

Rash Type	Appearance	Severity	Action
Erythematous rash	Fine red spots or blotchy redness	Mild	No treatment needed, resolves on its own
Macular rash	Flat, slightly coloured patches	Mild	No treatment needed
Heat rash (miliaria)	Tiny clear or red bumps	Mild	Improve room cooling, especially in Ahmedabad summers
Purpuric rash	Purple or red spots that do not blanch	Requires evaluation	Contact doctor immediately
Blistering or peeling	Blisters or skin peeling	Uncommon, needs attention	Stop phototherapy and contact doctor

Management tips:

Check the baby's skin at every feeding break
Keep the baby's skin clean and dry
Do not apply lotions, oils, or powders on the skin during phototherapy (they can interfere with treatment or react with the light)
If the rash seems to worsen significantly or involves blistering, contact your paediatrician

3. Dehydration Risk

How common: Risk is present in all babies; actual dehydration preventable with proper feeding

Phototherapy increases insensible water loss through the baby's exposed skin by approximately 20-40%. This means your baby needs more fluids during treatment than usual. In Ahmedabad's hot and dry climate (especially March to June when temperatures routinely exceed 40 degrees Celsius), the dehydration risk is even higher.

Signs of dehydration to watch for:

Fewer than 6 wet nappies in 24 hours (after day 4 of life)
Dark yellow or amber-coloured urine (should be pale yellow or colourless)
Dry lips and mouth
Sunken fontanelle (the soft spot on top of the head appears concave)
Decreased skin elasticity (skin stays pinched when gently pulled)
Excessive sleepiness or irritability
Reduced tears when crying (in older newborns)

Prevention:

Breastfeed every 2-3 hours including through the night
If the baby is not feeding well, discuss supplementation with your doctor
In Ahmedabad's summer heat, maintain room temperature at 25-27 degrees C using air conditioning
Monitor nappy output carefully and log each wet and soiled nappy
If you notice early signs of dehydration, increase feeding frequency and contact your doctor

4. Temperature Instability

How common: Relatively common, especially in very warm or very cool environments

Since the baby is wearing only a nappy during phototherapy, temperature regulation can be challenging. The phototherapy light itself generates some heat (less with modern LED units than older CFL devices), and the baby's exposed skin allows greater heat loss or gain from the environment.

Overheating risks (common in Ahmedabad):

Room temperature above 28 degrees C combined with phototherapy light can raise the baby's temperature
Signs: flushed skin, rapid breathing, temperature above 37.5 degrees C, irritability
Management: reduce room temperature, move the light slightly farther from the baby, check temperature again in 30 minutes

Cooling risks (less common in Ahmedabad but possible in winter):

Air conditioning set too low or direct cool air on the baby
Signs: cold hands and feet, temperature below 36.5 degrees C, mottled skin
Management: raise room temperature, briefly wrap the baby to warm up, then resume phototherapy

Check the baby's temperature every 3-4 hours using a digital thermometer under the arm. The target range is 36.5-37.5 degrees Celsius.

5. Bronze Baby Syndrome

How common: Rare (less than 1% of babies on phototherapy)

Bronze baby syndrome is a distinctive but uncommon side effect where the baby's skin, serum, and urine turn a dark greyish-brown (bronze) colour during phototherapy. It occurs almost exclusively in babies who have an elevated conjugated (direct) bilirubin level, which usually indicates an underlying liver or biliary tract problem.

Key facts:

The bronze discolouration is caused by accumulation of phototherapy breakdown products of conjugated bilirubin
The discolouration itself is not dangerous and resolves gradually after phototherapy stops
However, it signals an underlying condition (such as biliary atresia, neonatal hepatitis, or cholestasis) that requires investigation
If you notice your baby's skin turning an unusual dark grey or bronze colour during treatment, inform your paediatrician immediately

Note for parents: Bronze baby syndrome is not caused by the phototherapy itself. The phototherapy simply reveals an underlying problem that was already present. Early detection through this observation can actually be beneficial as it prompts timely investigation of the liver issue.

6. Increased Sleepiness

How common: Very common

Babies under phototherapy often become sleepier than usual. The warm light and consistent exposure seem to have a soothing effect. While this may seem convenient, excessive sleepiness can be a problem because:

The baby may not wake for feeds, leading to reduced intake and slower bilirubin clearance
It can make it harder to distinguish normal phototherapy drowsiness from the dangerous lethargy associated with very high bilirubin (bilirubin encephalopathy)

What to do:

Set alarms and wake the baby every 2-3 hours for feeds, even if they seem deeply asleep
Use gentle stimulation: remove eye shields, hold upright, tickle feet, change nappy before feeding
If the baby cannot be roused for feeds or seems floppy and unresponsive, this is a red flag. Contact your doctor immediately.

Rare or Uncommon Side Effects

Retinal Damage (Prevented by Eye Shields)

Phototherapy light can damage the developing retina if the eyes are directly exposed. This is entirely preventable with proper use of opaque eye shields. Always ensure shields are in place during treatment and check every 30 minutes for slipping.

Calcium Imbalance

Some studies have reported transient low calcium levels (hypocalcemia) during extended phototherapy. This is uncommon and usually subclinical (not causing symptoms). Your doctor may monitor calcium levels if phototherapy lasts more than 72 hours.

DNA Damage Concerns

Early studies raised theoretical concerns about DNA damage from phototherapy light. However, extensive research including long-term follow-up studies has found no evidence of increased cancer risk or genetic damage from neonatal phototherapy. The therapeutic blue light wavelengths used are far less energetic than UV radiation.

Side Effects vs. Warning Signs: Know the Difference

It is important to distinguish between expected side effects and warning signs that indicate a serious problem:

Expected Side Effects (Normal)	Warning Signs (Seek Help Immediately)
Loose green stools	Blood or mucus in stools
Mild skin rash	Blistering, severe redness, or peeling skin
Slightly sleepier than usual	Cannot be woken for feeds, limp or floppy
Mild temperature variation (within 36.5-37.5 C)	Fever above 38 C or temperature below 36 C
Increased nappy changes needed	Fewer than 4 wet nappies in 24 hours
Baby appears slightly tanned	Skin turning bronze, grey, or dark brown

Ahmedabad-Specific Considerations

Ahmedabad's climate presents unique challenges for managing phototherapy side effects:

Summer heat (March-June): Temperatures above 40-45 degrees C significantly increase dehydration risk. Air conditioning is essential. Feed more frequently and monitor nappies carefully.
Monsoon humidity (July-September): High humidity increases the risk of heat rash and fungal skin infections. Keep the baby's skin dry and the room well ventilated.
Winter (December-February): Ahmedabad winters are mild, but early mornings can be cool. Ensure the room stays warm enough for a baby wearing only a nappy.
Water quality: If you are using formula supplements (as advised by your doctor), use boiled and cooled water or RO-purified water.

Ahmedabad Healthcare Resources

Resource	Details
VS Hospital	Ellisbridge, government hospital with neonatal unit, 079-2657 7621
Civil Hospital, Ahmedabad	Asarwa, largest government hospital with free SNCU
Sterling Hospital	Multiple locations, advanced NICU
Shalby Hospital	SG Highway, paediatric and neonatal care
CIMS Hospital	Science City Road, comprehensive neonatal services
HEAMAC Ahmedabad	Home phototherapy rental with same-day delivery across Ahmedabad

Managing Side Effects: Summary for Parents

Most phototherapy side effects are mild, temporary, and resolve once treatment stops
Frequent breastfeeding (every 2-3 hours) prevents most side effects by maintaining hydration and promoting bilirubin excretion
Temperature monitoring every 3-4 hours and proper room climate control are essential
Check the baby's skin and eye shields at every feeding break
Keep a log of nappy output, feeding times, and any observations
Know the difference between expected side effects and warning signs
When in doubt, contact your paediatrician or HEAMAC's 24/7 support team

HEAMAC's phototherapy units in Ahmedabad use modern LED technology that produces less heat and more targeted therapeutic light compared to older CFL devices, reducing the risk of temperature-related side effects. Our technicians will explain proper positioning and monitoring during setup, and our support line is available around the clock throughout your rental period.

Phototherapy Side Effects: What Parents in Ahmedabad Should Know