Symptoms
Boils
Boils can occur anywhere on your skin, but appear mainly on your face, neck, armpits, buttocks or thighs â hair-bearing areas where you're most likely to sweat or experience friction. Signs and symptoms of a boil usually include:
- A painful, red bump that starts out about the size of a pea
- Red, swollen skin around the bump
- An increase in the size of the bump over a few days as it fills with pus (can sometimes reach the size of a baseball)
- Development of a yellow-white tip that eventually ruptures and allows the pus to drain out
Carbuncles
A carbuncle is a cluster of boils that form a connected area of infection. Carbuncles often occur on the back of the neck, shoulders or thighs. Compared with single boils, carbuncles cause a deeper and more severe infection and are more likely to leave a scar. People who have a carbuncle often feel unwell in general and may experience a fever and chills.
When to see a doctor
You usually can care for a single, small boil yourself. But see your doctor if you have more than one boil at a time or if a boil:
- Occurs on your face
- Worsens rapidly or is extremely painful
- Causes a fever
- Is more than 2 inches (5 centimeters) across
- Hasn't healed in two weeks
- Recurs
Source: http://www.mayoclinic.com