what can cause a rash
Infection of the skin can cause a rash as well. Bacteria, fungi, and viruses can all affect the skin. Bacterial diseases generally appear as pustules, tender crusted areas, or in ring like patches (Lyme disease). Fungal diseases such a ringworm or athletes foot are also very common.
There are many causes of a rash, including, but not limited to, allergic or irritant dermatitis, autoimmune disease, infections, medications, and rarely cancer of the skin. Allergic contact dermatitis is a skin condition that arises after contact with a chemical from which you have developed an allergy.
Medications are a frequent cause of rash. Basically, any medication can cause a rash to develop in any person. Common medications that cause a rash include antibiotics, and medications for high blood pressure and cholesterol. Rarely, cancer of the skin can present as a skin rash.
Roseola is the most common infection to cause a rash after a fever. Roseola is a viral infection. This is a common infection for infants and toddlers. It usually causes a high fever that goes up and down for 3 days. About the time the fever breaks a rash of red spots appears on the trunk and spreads to other parts of the body. The rash lasts for a few days and then goes away. Other viruses can also cause a rash after a fever.
Eczema (child) Eczema is a common cause of skin rashes in children, causing redness, bumps, swelling, itchiness, and more. Actinic keratosis Actinic keratosis is scaly or crusty bumps that appear on areas of skin that get a lot of sun exposure.