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Possible triggers include:

• Shaving.

• Tight clothing.

• Excessive sweating.

• Friction.

• Occlusive skin products.

• Hot tubs.

• Certain infections.

Folliculitis commonly affects areas containing hair follicles, such as the arms, legs, thighs, and torso.

It can sometimes produce itchy or tender bumps.

The lesions may resemble acne.

Mild cases often improve when irritating factors are removed and the skin is kept clean.

More severe or persistent cases may require medical treatment.

Antibiotics or antifungal medications are sometimes used depending on the cause.

It is important not to assume that every small bump is bacterial folliculitis.

Using antibiotics unnecessarily can cause side effects and contribute to antimicrobial resistance.

A healthcare professional can determine whether testing or prescription treatment is necessary.

8. Keratosis Pilaris: Harmless Rough Bumps on the Skin

Keratosis pilaris is a common skin condition that produces small, rough bumps.

It occurs when keratin, a protein found in the skin, accumulates around hair follicles.

The bumps often feel similar to sandpaper.

They may be skin-colored, pink, or slightly red.

Common locations include:

• The upper arms.

• The thighs.

• The buttocks.

• Sometimes the cheeks.

Unlike infections, keratosis pilaris is not contagious.

It is not dangerous and does not indicate that someone has poor hygiene.

The condition is often associated with dry skin and may become more noticeable during colder months.

People with eczema or a family history of keratosis pilaris may be more likely to develop it.

Treatment is generally focused on improving skin texture.

Moisturizers containing urea, lactic acid, or other suitable ingredients may help.

Some products containing salicylic acid can also reduce the accumulation of dead skin cells.

However, aggressive scrubbing may worsen irritation.

Keratosis pilaris can improve over time, although it may persist for years.

9. Milia: Small White Bumps Beneath the Skin

Milia are tiny, firm, white or yellowish cysts that develop when keratin becomes trapped beneath the skin surface.

They are commonly seen around the eyes and cheeks, although they can appear elsewhere.

Milia are generally harmless and do not represent an infection.

They often resemble small whiteheads, but they are not ordinary acne pimples.

Unlike inflamed pimples, milia typically do not have a red, swollen base.

They may remain unchanged for weeks or months.

Some disappear naturally, while others persist.

Milia can develop after skin injury, burns, certain skin conditions, or the use of particular heavy topical products.

They may also occur without any identifiable trigger.

People should avoid squeezing them with their fingernails or attempting to remove them with needles.

Improper removal can cause infection, scarring, or skin damage.

A dermatologist can remove persistent milia safely when treatment is desired.

10. Skin Tags and Other Benign Growths

Not every raised bump is an infection.

Some are benign skin growths that develop gradually.

Skin tags, also known as acrochordons, are small, soft growths that commonly appear around the neck, underarms, eyelids, and other skin folds.

They may be attached by a narrow stalk.

They are usually painless and harmless.

Skin tags become more common with age and may be associated with friction and metabolic factors.

Other benign growths include seborrheic keratoses and certain types of cysts.

Their appearance can vary considerably.

However, a new growth should not automatically be classified as a skin tag, particularly when it changes rapidly or has unusual characteristics.

Any lesion that bleeds repeatedly, develops an irregular surface, changes color, or grows quickly deserves professional evaluation.

A dermatologist can determine whether a growth is benign and whether removal is appropriate.

11. When Small Bumps Could Be a Sign of a More Serious Skin Condition

Most small skin bumps are not dangerous.

Nevertheless, certain changes deserve closer attention because some skin cancers and precancerous lesions can initially resemble ordinary skin growths.

Basal cell carcinoma, squamous cell carcinoma, and melanoma can all produce visible changes.

Their appearances differ.

Basal cell carcinoma may appear as a pearly bump, a persistent sore, or a lesion that bleeds and repeatedly forms a crust.

Squamous cell carcinoma may appear as a firm raised growth, a scaly patch, or a nonhealing ulcer.

Melanoma often develops as a changing pigmented lesion, although some melanomas have little or no pigment.

The important warning signs include:

• A lesion that continues growing.

• A sore that does not heal.

• Repeated spontaneous bleeding.

• An irregular or changing surface.

• A new growth that looks different from surrounding spots.

• Changes in color or shape.

• Persistent crusting.

• A firm lesion that becomes progressively larger.

The ABCDE method is commonly used to identify suspicious pigmented lesions:

A – Asymmetry: One half looks different from the other.

B – Border: The edges are irregular, blurred, or uneven.

C – Color: Different colors or uneven pigmentation appear within the lesion.

D – Diameter: The lesion is often larger than 6 millimeters, although melanoma can be smaller.

E – Evolving: The spot changes in size, shape, color, or symptoms.

Not every lesion with these characteristics is melanoma.