Please choose the correct ending to complete the given sentence: Health: [header] How to diagnose a rash [title] Learn about common rashes. [step] A rash is a skin inflammation that causes discoloration to the affected area. There are many different types of rashes.

Ending1: The most common type of rashes include : [substeps] A rash on your neck and forehead. It may change weight, shape and color. Ending2: Some cause discomfort, and some are more severe than others. Familiarize yourself with common rashes so that you will be able to knowledgeably treat your rash. Ending3: Common rashes involve the throat and the area surrounding it. [step] It is highly contagious, particularly to children and household members. Ending4: Some are uninfected, others over the course of several weeks, and others more serious. [substeps] A rash may start two weeks after discoloration, but will spread over time.

Answer format: ending1/ending2/ending3/ending4