Even though things are settling down, medical care is not Afghanistan's strong point.
Health care is available in the major cities through aid groups.
They will be old and dusty and we do not recommend self-medication. A traveler with a serious condition should seek help in Pakistan or Iran. Better yet, take the next flight home or to London. Expect that the most basic medical care is limited or nonexistent with war wounded and children getting priority treatment. Chloroquine-resistant falciparcium has been reported.