When kidney function becomes impaired and the kidneys are unable to effectively filter and eliminate waste products through urine, fluids and metabolic byproducts can begin to accumulate throughout the body. This buildup may contribute to swelling, fluid retention, elevated toxin levels in the bloodstream, and in more severe cases, symptoms associated with uremia or progressive kidney dysfunction.
A wide range of symptoms may be associated with reduced kidney efficiency and impaired waste elimination, including skin problems, strong body odour, excessive sweating of the palms and feet, water retention, lymphatic congestion, abdominal bloating, rapid weight gain, fatigue, and elevated blood pressure. These symptoms are often linked to the accumulation of waste products, mineral deposits, and crystal formation within the urinary system.
Kidney stones typically begin as microscopic mineral crystals that gradually enlarge over time. In their early stages, these crystals may be too small to detect through standard imaging and often produce no noticeable symptoms. However, as they accumulate, they can obstruct the flow of fluid through the small tubules of the kidneys. Stones form when minerals and other urinary compounds become highly concentrated and precipitate out of solution within the urinary tract.
Many kidney stones have sharp or irregular edges, and as they travel through the ureters toward the bladder they may irritate or damage the lining of the urinary tract. This can result in severe pain in the lower back or sides, blood in the urine, pain radiating into the legs or groin, numbness or discomfort in surrounding areas, and difficulty urinating.
Although most stones originate in the kidneys, some may also form in the bladder. If a larger stone obstructs one of the ureters, urine flow can become blocked, increasing the risk of complications such as infection, inflammation, or kidney damage. Persistent obstruction may place significant stress on the kidneys and interfere with their ability to regulate fluid balance, electrolytes, and waste removal effectively.
Kidney dysfunction can sometimes progress gradually, and normal urine output may still occur even in the presence of underlying kidney disease or impaired renal function.
Types of stones and their effects
Different types of kidney stones form from various substances that crystallise in the urine. The most common contributors include oxalates, phosphates, urates, uric acid, and the amino acids cystine and cysteine.
Foods and drinks high in oxalic acid—for example, regular tea—can encourage the formation of oxalate stones. When oxalic acid enters the body, calcium is used first to neutralise the acid, and the two bind to form calcium oxalate. If this happens often, the calcium oxalate can accumulate and crystallise in the kidneys.
Chocolate, cocoa-based drinks, and chocolate ice cream are also rich in oxalates. Taking large amounts of vitamin C can increase oxalate production as well. Another major type of stone is made from uric acid crystals, which come from the breakdown of purines found in many foods.
Why do a kidney cleanse?
The kidneys play a crucial role in filtering the blood, removing toxins such as lead, cadmium, and mercury, and maintaining the body’s balance of fluids and electrolytes. When kidney stones develop, these essential functions can become impaired. As toxicity rises, the risk of various health problems increases — including infections, high blood pressure, cardiovascular issues, neurological disorders, and even cancer.
Certain physical signs may suggest that crystals or stones are forming in the kidneys or bladder. These can include:
- Dark or pale discoloration beneath the eyes
- Puffiness or swelling around the eyes, especially upon waking
- Deep lines or wrinkles under or around the eyes
- Small white, tan, or dark bumps under the eyes, visible when the skin is gently stretched toward the cheekbones
- A drooping or overlapping upper eyelid
- Ongoing lower‑back discomfort
- Swelling in the feet or legs
- Persistent feelings of fear or anxiety
Some herbs are believed to help dissolve kidney stones within three to six weeks. Performing a kidney cleanse once or twice a year is said to support both prevention and healing, improving overall physical well‑being while also easing stress, fear, and anxiety.