Seeing Another’s Pain
A man who is suffering from tzara’as has to call out, “I am tamei.” The simple reason behind this commandment is to warn others not to approach him since he is tamei.
Tumah and Taharah
Why a Metzora Calls Out Tamei
Why a person with tzara'as must announce that he is tamei: to warn others away and so that they will pray for his recovery.