Opinion by

Bethlehem Steel Corporation (¡employer) appeals from the order of the Workmen’s Compensation Appeal Board (Board) which affirmed the referee’s decision setting aside a final receipt under Section 434 of The Pennsylvania Workmen’s Compensation Act (Act), Act of June 2, 1915, P.L. 736, as amended, 77 P.S. §1001.

Joseph F. Turjak (claimant) suffered a herniated disc, hack sprain and ¡strain, with involvement of connective tissue, on February 13, 1981, while using a jackhammer at work. The claimant received compensation for total disability from February 14, 1981 to November 18, 1981. He returned to work for the employer on November 19, 1981 at a light-duty job as a janitor. He received physical therapy at the employer’s infirmary from November 19, 1981 until November 23, 1981.

On November 23,1981, five days after returning to work as a janitor, the claimant felt a sharp pain in the back while emptying a trash receptacle. He was taken to the plant dispensary where he was treated by dispensary personnel. He signed the final receipt while at the dispensary. 1 He was unable to return to work after November 23, 1981.

Claimant consulted a chiropractor and was treated by him until June 1982. In May 1982, the claimant consulted Dr. David Eaton, a neurosurgeon. Dr. Eaton, together with Dr. Peter Kozicky, 'an orthopedic surgeon, performed a laminectomy, excision of a disc as well as a spinal fusion on the claimant.

*332 On September 10, 1982, tbe claimant filed a claim petition alleging total disability since November 19, 1981, as a result of bis injury on February 13, 1981. At a pretrial bearing, tbe referee granted tbe claimant’s motion to amend bis pleading to constitute a petition to set aside tbe final receipt. On June 27, 1984, tbe referee granted tbe claimant’s petition as of November 23,1981 based upon tbe claimant’s proof by sufficient competent evidence tbat all disability resulting from bis work-related injury of February 13, 1981 bad not ceased as of November 23, 1981, wben be executed tbe final receipt. Tbe Board entered an opinion and order affirming tbe referee.

On its appeal to tbis court, tbe employer contends tbat tbe claimant did not present medical evidence to establish tbat be was disabled at tbe time be signed the final receipt as required by Sheibley v. Workmen’s Compensation Appeal Board (ARA Food Services Company), 86 Pa. Commonwealth Ct. 28, 483 A.2d 593 (1984).

In Sheibley we held tbat in order to set aside a final receipt under Section 434 of tbe Act, 77 P.S. §1001, it is tbe claimant’s burden to prove by “sufficient credible competent evidence” tbat all disability attributable to tbe injury bad not, in fact, ceased wben tbe final receipt was executed. We also beld in Sheibley, as the employer points out, tbat medical evidence must be produced to meet the claimant’s burden.

However, more recently in Dunmore School District v. Workmen’s Compensation Appeal Board (Lorusso), 89 Pa. Commonwealth Ct. 368, 372, 492 A.2d 773, 775 (1985), we beld tbat a claimant’s own testimony can support a finding that the claimant was still disabled at tbe time be signed tbe final receipt and tbat “[ujnequivooal medical testimony is required to establish continuing disability only in those cases where tbe claimant has resumed work with no loss of *333 earning power and no obvious residual disability. Where it is obvious that the disability is the result of the original injury, however, medical testimony is not required. ’ ’

The claimant’s testimony sufficiently establishes that he was disabled as the result of the original injury when he signed the final receipt. He was hurt using a jackhammer on February 13,1981; he returned to light duty on November 19, 1981; he had an episode of pain on November 23, 1981 (the date he signed the receipt in the dispensary); he was operated on in August 1982; and he has been disabled .since.

On this record the referee, whose decision was affirmed by the Board, correctly concluded that the claimant had carried his burden of proving that his disability had not ceased on November 23, 1981, when he signed the final receipt.

Order affirmed.

Order

And Now, this 3rd day of March, 1986, the order of the Workmen’s Compensation Appeal Board in the above-captioned matter is affirmed.