Foamy urine in 70 year olds is not required if it is caused by physiological factors such as drinking too little water and urinating too quickly. However, if it is caused by glomerulonephritis, diabetes, cystitis and other diseases, you need to take diuretics, blood pressure medication, hypoglycemia, antibiotic drugs for the cause. 1. Physiological factors: drinking too little water, sweating too much, may lead to urine concentration or urination too quickly, resulting in air and urine mixed together, easy to form foam, resulting in 70-year-old people with foamy urine. 2. Glomerulonephritis: 70-year-old foamy urine may be caused by glomerulonephritis, patients need to take oral hydrochlorothiazide, furosemide and other diuretics under the guidance of a doctor, or oral Benadryl, perindopril and other blood pressure-lowering drugs. 3. Diabetes: 70-year-old foamy urine is also considered to be caused by diabetes, patients can take oral glibenclamide, gliclazide and other hypoglycemic drugs under the guidance of a doctor. 4. cystitis: 70-year-old foamy urine may also be caused by cystitis, the patient can follow the doctor’s instructions oral antibiotic drugs, such as ciprofloxacin, ofloxacin, cefaclor and so on. There are many causes of foamy urine in 70-year-olds, and it is recommended to go to the regular hospital in time so as to clarify the cause of the disease.