Is kidney damage reversible?

See below. There are many causes of kidney damage/injury. Some are reversible and some are not. If its an allergic reaction to a medication, this injury is generally reversible.If its damage to the kidney from a disease called diabetic nephropathy, it may be progressive injury and irreversible.
Depends on the cause. Kidney damage can occur due to various reasons.Some are long standing and irreversible like diabetic kidney disease.Some may be reversed if diagnosed at early stages or it is caused by recent insult like medications, herbs, surgeries etc.