Marble Falls Police said they are searching for 30-year-old Regina Lewis.
She has not been heard from since Monday when she left her home. She was wearing a pink shirt with blue jeans or possibly black stretch pants and tennis shoes.
Police said she has a medical condition which could put her in danger. The department said they received many reports that Regina was seen Tuesday afternoon in Marble Falls trying to get a ride to the Austin area.
Police are asking the public to call the department if they have seen her at 830-693-3611.