<s>[INST] I have three members in my household. All three of us are experiencing a weird rash on our bodies. My son and I have eczema so that is what I thought it was but my dad is experiencing it now and he does not have eczema. The weirdest thing about it is I know on my son its presenting itself on my upper thighs and the top of my butt crack and on his gentals at bump. Not pimples and not pussy or oozing just bumps. I don't know if it is doing this to my dad as well though. [/INST] Hello.A possible diagnosis is fungal infection spread by one of the members of the family to another.It is also possible the appearance of rash after  contaminated food ingested by the three.Go to your doctor.He will examine your injuries and will establish right diagnosis and treatment.I wish you good health.(If the answer has helped you, please indicate this) </s>