Carl Porter, Mississippi prisoner # R7051, filed a motion to proceed in for- *569 ma pauperis (IFP) on appeal challenging the district court’s certification that his appeal was not taken in good faith pursuant to Baugh v. Taylor, 117 F.3d 197 (5th Cir. 1997). His motion for appointment of counsel is denied.

Porter argues that the district court erred in dismissing his complaint. He argues that the defendant Hemphil acted with deliberate indifference to his medical needs and that the district court should have given him the opportunity to amend his complaint if it was deficient. He also argues that he attempted to exhaust all administrative remedies. This court’s inquiry into Porter’s good faith “is limited to whether the appeal involves ‘legal points arguable on their merits (and therefore not frivolous).’ ” Howard v. King, 707 F.2d 215, 220 (5th Cir. 1983) (citation omitted).

Porter argues on appeal that his claim against Medical Directors Beany and Liddell is limited to their failure to send him to a specialist and to change his pain medication. He admits that they did not deny him medical treatment. Porter’s allegation of disagreement with these doctors’ medical treatment of his condition is not sufficient to state a claim against Bearry and Liddell. See Varnado v. Lynaugh, 920 F.2d 320, 321 (5th Cir. 1991).

If Porter’s allegations against the defendant Hemphil are accepted as true, they were sufficient to state a claim of deliberate indifference. See Ashe v. Corley, 992 F.2d 540, 544 (5th Cir. 1993). The district court prematurely dismissed the claim against Hemphil without a further factual development of the underlying facts. See Eason v. Thaler, 14 F.3d 8, 9-10 (5th Cir. 1994).

In light of a recent Supreme Court opinion, the district court also erred in dismissing the claims against Dr. Lehman and Nurse Flowers for failure to exhaust administrative remedies because the lack of exhaustion is an affirmative defense that need not be pleaded in a prisoner’s complaint and Porter’s complaint did not establish a failure to exhaust. See Jones v.. Bock, — U.S. —, 127 S.Ct. 910, 920-21, 166 L.Ed.2d 798 (2007); Aquilar-Avellaveda v. Terrell, 478 F.3d 1223, 1225-26 (10th Cir. 2007). Porter’s allegations that Lehman and Flowers deliberately caused him unnecessary pain were sufficient to state a claim of deliberate indifference.

Because Porter has raised nonfrivolous claims against Hemphil, Lehman, and Flowers, his appeal has arguable merit. His motion to proceed IFP is granted, the judgment of the district court with respect to those defendants is vacated and the case is remanded for further proceedings. The judgment is affirmed with respect to the dismissal of the claims against Doctor Be-any and Doctor Liddell.

IFP GRANTED; APPOINTMENT OF COUNSEL DENIED; JUDGMENT AFFIRMED IN PART, VACATED IN PART; CASE REMANDED.