Many people know the feeling: a sore, red corner of the big toe that makes every step in closed shoes uncomfortable. In Malay this is often called kuku masuk isi, literally “nail into the flesh”, and in English it is an ingrown toenail. For some people it settles and is soon forgotten. For others it keeps returning on the same toe.
This article explains what an ingrown toenail is, why it comes back, how it relates to a nail-fold infection called paronychia, and the warning signs that mean a doctor should take a look. It is general knowledge-sharing for readers in Silibin and around Ipoh, not a substitute for an examination: only a doctor can assess a particular toe.
Apa itu kuku masuk isi? (What is an ingrown toenail?)
An ingrown toenail happens when the edge or corner of a toenail grows into, or presses deeply against, the soft skin fold beside it. The big toe is most often affected. It is common and occurs across age groups, including teenagers, young adults and older adults, whose toenails tend to thicken over time.
Signs can include tenderness along the side of the nail, redness, swelling, and sometimes pus at the nail edge. These signs can have more than one cause, and only a doctor can assess the cause in a particular case.
Why do ingrown toenails keep coming back?
A common frustration with kuku masuk dalam isi (nail growing into the flesh) is that it returns, usually because the reasons behind it are still there as the nail keeps growing. Factors linked with ingrown toenails include:
- Nail shape and family tendency. Some people naturally have wider or more curved toenails, and this can run in families.
- Tight or narrow footwear. Shoes that squeeze the toes together push the skin against the nail edge for many hours a day.
- Sweaty feet. In a hot, humid climate, feet often stay damp inside closed shoes, and softened skin can make it easier for a nail edge to dig in.
- Injury to the toe. Stubbing a toe, having it stepped on, or repeated pressure from sports can affect how the nail grows.
- Nail-trimming habits. Trimming toenails very short is often mentioned as a contributing factor, as is picking or tearing at the nail edges.
It is a myth that an ingrown toenail is always minor: in people with diabetes or poor circulation, a small toe problem can become serious more quickly.
Paronychia: when the skin fold around a nail becomes infected
Paronychia is the medical name for an infection of the skin fold around a fingernail or toenail, usually after germs get in through a small break in the skin. An ingrown toenail is one way it can start on the toes, but it also commonly affects the fingers.
Factors linked with paronychia include:
- Wet work, such as washing dishes, cleaning or food preparation, which keeps the skin around the nails soft
- Nail biting and finger sucking, which damage the skin fold
- Cutting or pushing back the cuticles, which disturbs the skin’s natural seal around the nail
- Diabetes, which can make infections more likely and slower to settle
Signs of paronychia can include redness, swelling, warmth, tenderness and pus at the nail edge. Only a doctor can assess the cause and decide what, if anything, is needed. For broader background, see the article on skin infection warning signs.
Kuku masuk isi (ingrown toenail) with diabetes, poor circulation or reduced feeling: who should see a doctor early
A sore toe that is not settling, keeps coming back, or looks infected is worth having checked. Some people are better off having it looked at early rather than waiting:
- People with diabetes, since diabetes can reduce feeling in the feet and affect blood flow, so an infection may go unnoticed
- People with poor circulation in the legs and feet
- People with reduced feeling in their feet, whatever the reason
- People with a weakened immune system
For them, any redness, swelling, break in the skin or discharge around a toenail is a reason to see a doctor promptly. A doctor may assess the toe and refer on when further care is needed, for example to a podiatrist or a hospital team. Related reading includes corn and callus warning signs and the page on wound care in Silibin, Ipoh.
Everyday habits that help prevent kuku masuk isi (ingrown toenails)
Prevention is mostly about reducing pressure and moisture around the toes:
- Footwear with room for the toes, so they lie flat without being squeezed; children’s shoes are worth checking as feet grow
- Keeping feet dry by changing damp socks and letting shoes air out between wears
- Protecting the toes with suitable footwear for sport and heavy work
- Leaving nails and cuticles alone, without picking, tearing or biting
- Keeping hands dry during wet work, for example with gloves for long periods of washing or cleaning
- Looking at the feet regularly if you have diabetes, a habit widely encouraged in diabetes foot care so any change can be shown to a doctor early
If trimming toenails is difficult, for example because of poor eyesight, thick nails or reduced feeling, it is reasonable to ask a doctor for advice.
Red flags: when to see a doctor promptly or go to the emergency department
See a doctor promptly if any of these are noticed:
- Red streaks spreading from the toe up the foot or leg
- A fever
- The whole toe swollen, not just the skin beside the nail
- Any sign of a nail infection in someone with diabetes
Go to the nearest emergency department, or call 999, if the person feels very unwell, for example with shivering, confusion or unusual drowsiness, if redness is spreading quickly, or if the toe turns dark, blue or black.
Frequently Asked Questions
Apa itu ingrown toenail (what is an ingrown toenail)?
Ingrown toenail is the English name for kuku masuk isi: a toenail edge growing into the skin fold beside it, most often on the big toe. It can be sore and sometimes becomes infected. Only a doctor can assess the cause of a painful, red toe.
Can an ingrown toenail heal itself?
Some mild ingrown toenails settle as the nail grows, while others keep returning or become infected. Only a doctor can assess a particular toe, and people with diabetes, poor circulation or reduced feeling in their feet should have it checked rather than waiting.
Kuku masuk dalam isi: is an ingrown toenail dangerous?
For most healthy people it is uncomfortable rather than dangerous, but it can become infected, and the risk is higher with diabetes, poor circulation or a weakened immune system. Spreading red streaks, fever, a swollen whole toe, or feeling very unwell are reasons to seek medical attention promptly.
Why do ingrown toenails come back?
Usually because the factors behind them continue, such as a naturally curved nail that runs in the family, tight footwear, sweaty feet or repeated injury. A doctor may assess why it keeps recurring and refer on where needed.
Is paronychia the same as an ingrown toenail?
No. An ingrown toenail is the nail edge growing into the skin, while paronychia is an infection of the skin fold around a nail. An ingrown toenail can be one starting point for paronychia, which also appears on fingers. Only a doctor can assess which is present.
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