ase ▁Add ison ’ s ▁disease ▁is ▁an ▁auto imm une ▁dis order ▁that ▁affect s ▁the ▁ad ren al ▁cor tex ▁such ▁that ▁it ▁is ▁unable ▁to ▁efficiently ▁se crete ▁h orm ones . ▁The ▁imm une ▁system ▁specifically ▁targets ▁the ▁cells ▁of ▁the ▁ad ren al ▁cor tex ▁and ▁dest ro ys ▁them , ▁but ▁Add ison ’ s ▁disease ▁can ▁also ▁be ▁caused ▁by ▁a ▁severe ▁in fection ▁such ▁as ▁t uber cul osis . ▁Some ▁sympt oms ▁include ▁hyp og ly cem ia ▁and ▁decre ased ▁blood ▁sod ium ▁levels ▁and ▁increased ▁blood ▁pot ass ium ▁levels ▁caused ▁by ▁a ▁def ic iency ▁of ▁al d oster one . ▁These ▁electro ly te ▁im bal ances ▁indu ce ▁n erve ▁and ▁mus cle ▁issues . ▁Other ▁sympt oms ▁include ▁fat igue , ▁salt ▁c rav ings , ▁weight ▁loss , ▁and ▁increased ▁skin ▁p ig ment ation . ▁In cre ased ▁skin ▁p ig ment ation ▁is ▁caused ▁by ▁a ▁def ic iency ▁of ▁the ▁ad ren oc ort ical ▁h orm one ▁hyd roc ort is one . ▁Its ▁normal ▁behavior ▁would ▁be ▁as ▁negative ▁feedback ▁at ▁the ▁p itu it ary ▁g land , ▁stim ulating ▁the ▁p itu it ary ▁g land ▁to ▁decrease ▁secret ion ▁of ▁cort ic otrop in . ▁Because ▁hyd roc ort is one ▁is ▁not ▁able ▁to ▁be ▁produced ▁in ▁Add ison ’ s ▁disease , ▁the ▁p itu it ary ▁g land ▁continues ▁to ▁se crete ▁cort ic otrop in