Common symptoms include: 1  feeling very tired all the time (fatigue) 2  weight loss. 3  weakness. 4  joint pain. 5  in men, an inability to get or maintain an erection (erectile dysfunction) 6  in women, irregular periods or absent periods.
While both programs supplement the income of individuals who are unable to work due to a medical disability such as blindness, SSDI and SSI serve two distinct populations. The main difference between SSDI and SSI is eligibility. SSDI is available to those who have paid into the system through taxable income. SSI, on the other hand, serves as a safety net for those who do not qualify for SSDI and have limited means.
Average SSI Benefit. Supplementary Security Income, or SSI, is the other Social Security program that pays benefits to the disabled. However, to obtain SSI, you must also be considered low-income. On average, an SSI beneficiary receives $499 a month as of January 2011. Younger SSI beneficiaries receive the highest average benefit at $598, followed by those age 18 to 64 who receive $515, followed by those 65 and older who receive $403 a month.