What causes bumps on skin?

Bumps on skin can arise from a variety of underlying causes, ranging from minor irritations to more significant medical conditions.

Common Causes of Skin Bumps

Several factors can contribute to the development of bumps on the skin. According to the reference, these include:

Clogged Pores: Oil, dead skin cells, and bacteria can clog pores, leading to bumps like whiteheads, blackheads, or pimples.
Allergic Reactions: Contact with allergens such as certain plants, metals, or chemicals can trigger an allergic reaction, resulting in itchy bumps or hives.
Burns: Burns, whether from heat, chemicals, or radiation, can cause blisters and bumps as the skin attempts to heal.
Injury: Physical trauma to the skin can result in bumps, bruises, or swelling.
Sun Exposure: Prolonged sun exposure can lead to sunburn, characterized by red, painful bumps and blisters.
Viruses: Viral infections like chickenpox or herpes can cause characteristic bumps and lesions on the skin.
Friction: Repeated rubbing or friction against the skin can lead to irritation, blisters, or calluses, which may present as bumps.
Infections: Bacterial, fungal, or parasitic infections can cause a variety of skin bumps, depending on the specific pathogen involved.

Cause	Description	Example
Clogged Pores	Accumulation of oil, dead skin, and bacteria.	Acne
Allergic Reactions	Immune response to allergens.	Hives from a food allergy
Burns	Damage to skin from heat, chemicals, or radiation.	Sunburn blisters
Injury	Trauma to the skin.	Bruises or swelling
Sun Exposure	Prolonged exposure to ultraviolet radiation.	Sunburn
Viruses	Viral infections affecting the skin.	Chickenpox
Friction	Repeated rubbing or irritation.	Blisters from ill-fitting shoes
Infections	Infections caused by bacteria, fungi, or parasites.	Folliculitis (bacterial infection of hair follicle)

It's important to consult with a healthcare professional for proper diagnosis and treatment of any persistent or concerning skin bumps.