El apare din cauza unui defect de producere a insulinei de către pancreas sau din cauza incapacităţii celulelor de a utiliza corect glucoza (rezistenţă la insulină). În ambele cazuri, glucoza se acumulează în sânge, dând naştere hiperglicemiei. Inconvenientul major al diabetului este riscul de complicaţii. Hiperglicemiile prelungite deteriorează vasele sangvine şi nervii, fiind la originea a numeroase complicaţii, uneori foarte severe: boli cardiovasculare, neuropatie (atingerea nervilor), insuficienţă renală, retinopatie (atingerea nervului optic), ulceraţii ale picioarelor, infecţii recidivante. Cel mai bun mod de a depista un diabet incipient este măsurarea glicemiei sau a nivelului de glucoză în sânge, pe burta goală, printr- o simplă înţepătură din care va curge o picătură de sânge.
Iată care sunt semnele care indică faptul că ai putea suferi de diabet:
- nevoie frecventă de urinare (zi şi noapte)
- sete mare
- foame
- oboseală şi slăbiciune excesive
- scădere în greutate
- infecţii recidivante ale pielii, gingiilor, vezicii, vulvei sau prepuţului n cicatrizare dificilă
- furnicături în mâini şi picioare
Uneori, diabetul e indicat de semnele date de complicaţiile sale:
- probleme de vedere
- dureri sau crampe în picioare
- impotenţă
- boală cardiacă sau vasculară.
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