Swelling of fingers and toes with difficulty in passing urine is not due to gas and needs urgent evaluation; it may be related to kidney problems or persistent Kidney stones causing obstruction, or even Chronic kidney disease. Medicines like Himalaya Cystone may give mild relief but are not enough if symptoms continue. You should get urine tests, kidney function tests, and an ultrasound immediately and consult a urologist/physician. Do not delay, especially since urination is becoming difficult, this may need proper medical or procedural treatment.