This kind of exposure is called caustic exposure.
Explanation:
A caustic exposure is an exposure to chemicals present in common household cleaning products like detergents, cleaning solutions, drain cleaners etc.
These contain caustic substances (strong concentration of acid or base) like sodium hydroxide, sulfuric acid etc. When exposed directly on to the skin, due to its stronger concentration, it may burn the skin causing redness, irritation, numbness, or blackening of the skin surface.
Most of the times, these marks go away after some weeks because they are superficial or first-degree burn where only the epidermal layer of the skin gets affected.
A caustic exposure is one that leads to the sufferer sustaining burns afterwards.
A caustic exposure is one that leads to a burn on the body of the victim. In this case, we can see that Howard had a small burn on his arm.
Hence, an exposure in which the sufferer sustains an injury in the form of a burn can largely be regarded as a caustic exposure.
Learn more about caustic exposure: https://brainly.com/question/11934397
