Howard has a chemical burn from accidentally spilling a strong basic cleaning solution onto his arm. It causes a small burn mark

this would qualify as a minor degree burn

This type of exposure is known as caustic exposure.

Explanation:

Caustic exposure refers to contact with chemicals found in typical household cleaning agents, such as detergents, cleaning fluids, and drain cleaners.

These products include caustic materials (high concentrations of acids or bases) like sodium hydroxide and sulfuric acid. When they come into direct contact with the skin, their high concentration can result in burns, leading to redness, irritation, numbness, or darkening of the skin area.

Generally, these marks heal within weeks as they are superficial or first-degree burns, impacting only the epidermal layer of the skin.