What causes crystals in urine?

What causes crystals in urine?

There are many things that can cause crystals to form in urine. They include:

• Dehydration (not drinking enough water).
• Eating large amounts of certain foods, including protein, salt, fruits and vegetables.
• Medications such as amoxicillin, acyclovir, sulfonamides, atazanavir and methotrexoate.
• Urinary tract infections.
• Ethylene glycol poisoning.
• Having tumor lysis syndrome, which is caused by the death of a large number of cancer cells. This may happen as a result of cancer treatment.