S.C. Code Ann. § 15-3-40: Exceptions as to persons under disability.

If a person entitled to bring an action mentioned in Article 5 of this chapter or an action under Chapter 78 of this title, except for a penalty or forfeiture or against a sheriff or other officer for an escape, is at the time the cause of action accrued either:

(1) within the age of eighteen years; or

(2) insane;

the time of the disability is not a part of the time limited for the commencement of the action, except that the period within which the action must be brought cannot be extended:

(a) more than five years by any such disability, except infancy; nor

(b) in any case longer than one year after the disability ceases.