1.It'snotautomaticallythecasethatasignificantlyoverweightpersonwhosuddenlylosesweightissufferingfromanillness.2.Arapiddeclineinweightcouldbeduetoachangeinlifestyle,anincreaseinphysicalactivity,oralteredpsychologicalstresslevels.3.Unlessthereareaccompanyingphysicaldiscomforts,asuddenlossofweightmaynotindicateamedicalconditionandcouldpotentiallysignifyimprovedhealth.4.Itisadvisabletomaintainamoderatelevelofexercisetoenhancethebody'sresistancetoillness.5.Forpeaceofmind,itisrecommendedtoundergoacomprehensivehealthexamination.6.Inmostinstances,individualswhoexperienceanunexpectedweightlossdonotneedtobeoverlyconcerned,yetregularhealthcheck-upsremainasensibleprecaution.