The limitation on a person's physical functioning can be very hard to live with.
Really? How do you mean?
Because physical disabilities such as impairments limit facets of daily living :(
Ok. That is true
In many cases it can be caused by alcoholism like in the case of Prenatal disabilities that are acquired before birth 
So can alcoholism cause disability? 
Yes due to prolonged lack of oxygen or obstruction of the respiratory tract
Oh really? That is a bad situation to be in
birth in humans. These can be due to prolonged lack of oxygen or obstruction of the respiratory tract, damage to the brain during birth (due to the accidental misuse of forceps, for example) or the baby being born prematurely. These may also be caused due to genetic disorders or accidents.
Post-natal disabilities are gained after birth. They can be due to accidents, injuries, obesity, infection or other illnesses. These may also be caused due to genetic disorders.
Types.
Mobility impairment includes
Physical disability
A physical disability is a limitation on a person's physical functioning, mobility, dexterity or stamina. Other physical disabilities include impairments which limit other facets of daily living, such as respiratory disorders, blindness, epilepsy and sleep disorders.
Causes.
Prenatal disabilities are acquired before birth. These may be due to diseases or substances that the mother has been exposed to during pregnancy, embryonic or fetal developmental accidents or genetic disorders.
Perinatal disabilities are acquired between some weeks before to up to four weeks after