Think my son has hfm, was around other kids this weekend, my daughter doesn't seem to have it, but i'm worried now that other kids were exposed. ?

Not much to do. : It is unclear as to what your son has . Hand foot and mouth disease include a viral illness of painful oral ulcers, , low grade fever and vesicles on hands and feet. Sister will probably get it. Treatment is symptomatic. Warn the other families. time is the treatment.

Don't worry!: Hand foot mouth disease is highly contagious . But it is a self limited disease. Yes , we recommend limit exposure in kids who have them . But if other kids have been in contact with him already just let their parents know so they are aware of it and can seek the necessary medical attention . Don't worry ,it is fine .