1. Urine Volume Variation: If you notice a significant decrease in urine volume, it could be related to diabetes, dehydration, congestive heart failure, or kidney problems. 

Kidney diseases can cause decreased urine output and dark yellow urine. Diabetes can also cause decreased urine production. Dehydration can lead to reduced urine output, yellow urine, dry skin, and thirst. 

2. Persistent Foamy Urine: The state of urine can reflect the health of the urinary system. Normally, urine is clear and free of foam.

 If you notice persistent foamy urine, it may indicate proteinuria. A urinalysis can be done to determine if the kidneys are damaged. 

3. Blood in Urine: Some people may experience blood in their urine.

If there is pain associated with it, it may be related to urinary tract infections or urolithiasis. 

Symptoms usually resolve with treatment. However, painless blood in urine could indicate a urological tumor, requiring prompt examination. Hematologic diseases, tuberculosis, and heart disease can also cause hematuria.

4. Urinary Obstruction: Urinary obstruction may be caused by urethral stricture, prostate inflammation, or benign prostatic hyperplasia, especially in males as they age. 

Prostate-related issues can block urine flow, causing difficulty urinating. Prostate inflammation can also obstruct urine flow and result in difficulties with urination.