Then I would say Adema.
Here, check this out:
http://www.thehotpepper.com/showthread.php?t=4877
AND The diagnosis from OSU labs:
Diagnosis and Recommendations:Host/Habitat Pepper (Capsicum annuum var.); Cultivar: serrano chili
Diagnosis/ID Confirmed for: Oedema; Edema (Abiotic disorder)
Final Report :
The bumps on the pepper leaves are characteristic of a condition called edema, a non-infectious disorder.
The blisters develop when plants absorb more water than they are able to transpire. Later, the blisters may
rupture resulting in a scaly, crusty look and some distortion of the affected leaves.
Some plants, such as ivy geranium, are well known to suffer from edema and with ivy geranium, there are
some varieties that develop edema more frequently than others. Edema is an unusual problem on pepper,
there may be varietal differences among pepper types as there are among ivy geraniums.
Plant growth and production should not be significantly affected. The problem may, or may not, subside
once the affected plants are outdoors.
Barbara Bloetscher(bloetscher.1@osu.edu), Nancy J. Taylor (taylor.8@osu.edu); Dr.
Bob Precheur.
For C. Wayne Ellett Plant and Pest Diagnostic Clinic
Completed Date: 3/14/2008