I had a dream of one of my siblings eating off of tissues in the trash can and then coughing after.
Dreams can be highly personal and subjective, so it's important to consider your personal feelings and experiences when interpreting them. Generally, dreams reflect our subconscious thoughts, emotions, and fears.
In this dream, your sibling eating off of tissues in the trash can and then coughing could symbolize possible concerns about their health or well-being. It might suggest that you are worried about their physical health or their habits. Eating off of tissues could also symbolize a need to cleanse or clear something in their life.
Alternatively, this dream could represent a metaphorical interpretation. It could signify that you feel your sibling is engaging in self-destructive behavior or making poor choices, and you are concerned about the consequences they may face.
Ultimately, the true meaning of your dream can only be fully understood by considering your personal context and relationships with the sibling in question.