This case is before us a second time on appeal from an order of the Workers’ Compensation Appeal Board. When plaintiff initially ap*552plied to this Court for leave to appeal, we vacated the wcab’s denial of benefits to him and remanded this case for further proceedings on the ground that there was evidence to indicate that a possible causal connection may have existed between his employment and his condition. The wcab on remand, however, reaffirmed its denial of benefits on slightly different grounds.
Plaintiff then applied again to this Court for leave to appeal, which we denied. Thereafter, he applied for leave to appeal to the Supreme Court. The Court, in lieu of granting leave, remanded this case to this Court for consideration as on leave granted. 426 Mich 857 (1986). We affirm.
Plaintiff began working at defendant’s Huber Foundry in July, 1973. During his working hours, plaintiff was exposed to oil, grease and very hot temperatures. Approximately one to three weeks after beginning employment, he developed pimples. The pimples spread increasingly and covered his face, shoulders, arms and ultimately his entire body. A recurring pattern developed such that when plaintiff would take time off from work, his skin cleared up; when he would return to work, the skin condition would return. Plaintiff missed work from November 7, 1975, to March 2, 1976; June 12, 1976, to February 18, 1979; and March 8, 1979, to March 26, 1979. His last day of work was April 23, 1979.
During his years of employment, plaintiff received both inpatient and outpatient treatment. From November 7, 1975, to March 2, 1976, and June 12, 1976, to February 18, 1979, defendant voluntarily paid plaintiff disability benefits of $130 per week. Plaintiff began to receive extended disability benefits in November, 1979, and also received general assistance.
At the hearing before the workers’ compensation *553referee, the deposition of dermatologist Earl J. Rudner, M.D., was admitted into evidence. Rudner had treated plaintiff four times from April, 1979, through June, 1979. Rudner had never seen plaintiff while his skin condition was in the active stage, and therefore based his conclusions on a visual examination of plaintiff as well as his physical history. He testified that plaintiff had primary folliculitis and secondary contact dermatitis, that could be exacerbated by further skin contact with oil and grease.
Rudner had offered to test plaintiff with materials from the work place, but plaintiff did not submit to the testing. According to Rudner, the environment of the foundry lends itself to skin eruptions. He further testified that contact dermatitis is acquired, not inherited. Plaintiff elected not to return for follow-up care in contravention of Rudner’s recommendation.
Safety Environmental Supervisor John D. Brazil testified for defendant, stating that a person working on the conveyor line at defendant’s Huber Foundry would have little exposure to oil, although he was aware that oil was used to lubricate the deck. He also testified that work restrictions had been placed on plaintiff’s employment in an attempt to help his skin problem.
In rebuttal, one of plaintiff’s fellow employees testified that at the foundry there was steel dust in the air and oil and grease on the floor. The mist in the air stuck to a person’s body upon contact.
The referee granted plaintiff an open award of benefits beginning April 24, 1979, in the amount of $156 per week, plus reasonable and necessary medical expenses.
Upon review of that award, the wcab reversed it in part. The wcab, finding that plaintiff’s employment with defendant "caused at most an exacerba*554tion of symptomatology and did not cause or aggravate the plaintiffs underlying condition,” limited the award of benefits to plaintiff to the time period of April 23, 1979, to June 11, 1979.
On remand, the wcab found that plaintiff’s skin condition was an "ordinary disease of life”; that the condition had not been aggravated or accelerated by plaintiff’s employment; and that plaintiff had totally recovered from the skin condition as of June 11, 1979. Since the medical inadvisability of working at a specific job was not sufficient to render an individual disabled in the field of common labor, plaintiff was not entitled to compensation after June 11, 1979.
Plaintiff now argues that the wcab failed to aPPly proper legal standards. He further argues that its decision was unsupported by the evidence and based on erroneous factual findings.
On review of a wcab decision, findings of fact are conclusive absent fraud. Const 1963, art 6, § 28; MCL 418.861; MSA 17.237(861); Burns v General Motors Corp, 151 Mich App 520, 527-528; 391 NW2d 396 (1986). Such findings will not be overturned if this Court finds any competent evidence to support them. Schaefer v Williamston Community Schools (After Remand), 150 Mich App 186, 190; 387 NW2d 856 (1986). However, the appellate court may examine the board’s application of legal standards. Devault v General Motors Corp, 149 Mich App 765, 769; 386 NW2d 671 (1986). If the wcab applied an erroneous legal standard, the correct procedure is to reverse and remand to the wcab for further fact-finding and conclusions of law. Williams v Lang (After Remand), 415 Mich 179, 183; 327 NW2d 240 (1982); Murdock v Michigan HMO, 151 Mich App 578, 581; 391 NW2d 757 (1986).
Plaintiff argues that because he was unable to *555work at his previous position due to the possibility of recurrence of the pimples, he was disabled within the meaning of MCL 418.401; MSA 17.237(401), relying also on Adair v Metropolitan Building Co, 38 Mich App 393, 401-403; 196 NW2d 335 (1972). Although the wcab determined that plaintiff was not entitled to compensation notwithstanding the medical inadvisability of returning to work, it did not apply improper legal standards, for the question whether it was medically advisable for plaintiff to return to work is not relevant until it is established that the disability was caused or advanced by the work. That it is inadvisable for plaintiff to return to work at Chrysler does not entitle him to benefits unless he has suffered a compensable injury. Kostamo v Marquette Iron Mining Co, 405 Mich 105, 116; 274 NW2d 411 (1979).
In all successful workers’ compensation cases, the claimant must establish by a preponderance of the evidence both a personal injury and a relationship between the injury and the workplace. Miklik v Michigan Special Machine Co, 415 Mich 364, 367; 329 NW2d 713 (1982); Devault, supra at 769. Where it is only plaintiff’s symptoms, not his underlying condition, which have been aggravated by his employment, plaintiff is entitled to a closed award of benefits only. See Carter v General Motors Corp, 361 Mich 577, 594; 106 NW2d 105 (1960).
The Supreme Court set forth the criteria for a compensable injury in Kostamo, supra at 116:
The workers’ compensation law does not provide compensation for a person afflicted by an illness or disease not caused or aggravated by his work or working conditions. Nor is a different result required because debility has progressed to the point *556where the worker cannot work without pain or injury. . . . Unless the work has accelerated or aggravated the illness, disease or deterioration and, thus, contributed to it, or the work, coupled with the illness, disease or deterioration, in fact causes an injury, compensation is not payable.
The wcab found that plaintiff had not met his burden of proving that his employment caused or aggravated his underlying condition; that at most it caused an exacerbation of symptomatology. The wcab relied for its determination on the extremely close time relationship between his employment and the manifestation of his symptoms. It also relied on the fact that plaintiffs expert, Dr. Rudner, although testifying that the employment exposure caused the symptomatology, never saw plaintiff when his condition was in an active state, but, rather, saw him more than three years after his symptoms became manifest. The expert therefore gave his medical opinion on the basis of his own presumptions and plaintiffs history.
Although Dr. Rudner indicated that plaintiffs condition had been "acquired” rather than "inherited,” the wcab noted that the opinion was based solely on plaintiffs history without benefit of any proofs adduced at the hearing relative to the types of chemical exposure or oil composition that may have been present. Just where the plaintiff acquired the condition is a question of fact as to which plaintiff had the burden of persuasion. The wcab concluded that plaintiffs condition was "an ordinary disease of life.” We find that the wcab applied the appropriate legal standard to this case.
Plaintiff also argues that the decision of the wcab was unsupported by the evidence and based on erroneous factual findings. Findings of the wcab regarding whether a disability exists and whether a particular employment has aggravated *557a condition to the point of disability are findings of fact. Dressler v Grand Rapids Die Casting Corp, 402 Mich 243, 250; 262 NW2d 629 (1978). The evidence may be circumstantial; the wcab not only passes on the credibility of witnesses, but draws its inferences from the facts which it finds established. Castillo v General Motors Corp, 105 Mich App 776, 780; 307 NW2d 417 (1981), lv den 412 Mich 895 (1982). Where it is only plaintiff’s symptoms, not his underlying condition, which have been aggravated by his employment, plaintiff is entitled to a closed award of benefits only. See Carter, supra at 594.
The wcab concluded as a matter of fact that evidence submitted by plaintiff failed to satisfy his burden of proving causation. Our review of the record persuades this Court that the evidence (or lack of it) allows a conclusion that plaintiff failed to sustain his burden of proof regarding causation. See McClain v Chrysler Corp, 138 Mich App 723, 728; 360 NW2d 284 (1984), lv den 422 Mich 914 (1985).
This is not, as plaintiff asserts, a case in which the wcab made findings of fact contrary to the undisputed evidence; rather, it is a situation in which plaintiff’s proofs are insufficiently probative in the eyes of the trier of fact. See Aquilina v General Motors Corp, 403 Mich 206, 211-212; 267 NW2d 923 (1978).
Accordingly, the order of the wcab is affirmed.