And I was stunned when I found out what the truth was...

Plantar wart (also called a verruca) on the sole of the foot.
A plantar wart is caused by certain strains of the human papillomavirus (HPV) that infect the outer layer of skin, especially on pressure areas such as the heel or ball of the foot.
The rough thickened skin, circular callus-like rim, and multiple tiny black dots are classic signs. Those black dots are usually clotted tiny blood vessels, not dirt.
A plantar wart can become very painful because it grows inward under body weight pressure instead of outward.
When walking, standing, dancing, or running, pressure pushes the wart deeper into the foot, causing tenderness, burning, or the feeling of stepping on a pebble. That is why your daughter may be limping and crying.

Why It Hurts So Much
The sole of the foot carries body weight all day. Unlike warts on the hand, plantar warts are compressed by every step. The skin around them often hardens into a callus, which adds pressure. If she has a dance recital tomorrow, repeated jumping, turning, and pointing the foot may increase pain significantly.
What You Should Do Right Now
Because she is in pain and needs quick relief, the fastest goal is reducing pressure, not fully curing it overnight.
1. Cushion the Area
Use a donut-shaped pad, moleskin pad, corn cushion, or soft foam pad with a hole in the center. Place the hole directly over the wart so pressure goes around it instead of onto it. This often gives immediate relief while walking.
2. Wear Soft Supportive Shoes
Avoid barefoot walking, thin flats, hard soles, or tight dance shoes if possible until pain improves. Use cushioned sneakers or soft supportive footwear today.
3. Pain Relief
If your child can safely take it and has no medical restrictions, age-appropriate acetaminophen or ibuprofen may help pain and inflammation. Follow pediatric dosing instructions or ask a pharmacist.
4. Keep It Clean and Dry
Wash gently with soap and water, dry well, and keep socks clean. Moisture and friction can worsen irritation.

What Not To Do
Do Not Cut It Yourself
Do not dig it out with tweezers, razors, scissors, nail clippers, or sharp tools. This can cause bleeding, infection, severe pain, and spread the virus.
Do Not Rip Off the Skin
The thick yellowish skin around it is protective callused skin. Pulling it off can make walking worse.
Do Not Use Strong Acid Randomly the Night Before an Event
Many over-the-counter wart treatments contain salicylic acid. These help over time, but applying them right before dancing may sting, soften skin too much, and increase discomfort.
Best Fast Treatment Options
If you need rapid improvement, a podiatrist, pediatrician, urgent care, or dermatologist can examine it and sometimes thin the callus, provide padding, confirm diagnosis, and discuss treatment. Common medical treatments include:
Salicylic acid programs over weeks
Cryotherapy (freezing)
Cantharidin or prescription treatments
Debridement of thick dead skin by a professional
Laser or advanced treatment in stubborn cases
Is It Contagious?
Yes, plantar warts can spread through skin contact or contaminated floors, especially locker rooms, pools, studios, and communal showers. The virus enters through tiny breaks in skin.
To reduce spread:
Do not pick at it
Do not share socks or shoes
Wear flip-flops in public wet areas
Keep feet dry
Cover if recommended by doctor
Could It Be Something Else?
Sometimes calluses, corns, splinters, or other lesions can look similar. But the black dots + rough surface + pain with pressure + location on sole strongly suggest plantar wart.
For Tomorrow’s Dance Recital
If she must participate:
Pad it with a donut cushion
Use comfortable shoes before performance
Limit unnecessary walking beforehand
Consider pain relief if safe
If pain is severe, let her rest and seek treatment instead
A recital matters, but protecting her foot matters more if she cannot bear weight.

See a Doctor Promptly If:
Redness or swelling spreads
Drainage or pus appears
Fever develops
She cannot walk normally
Pain is severe
It grows quickly
Multiple new lesions appear
May you like
She has diabetes, immune problems, or poor circulation
Bottom Line
This most likely is a painful plantar wart. It is common, treatable, and usually not dangerous, but it can hurt a lot because it is on a weight-bearing part of the foot. For fast relief today, focus on padding and reducing pressure. For actual removal, arrange a medical visit soon. If she is crying in pain or cannot walk, seek urgent evaluation today.