Honey Boo Boo's dad Mike "Sugar Bear" Thompson continues to fight for his health, battling a rare brain disorder.

On Monday, June Shannon, revealed on Facebook that she is currently in Jacksonville, Fla. after Sugar Bear underwent neurological testing at the nearby Mayo Clinic.

“Have to go back for more tests today and we will b here all week to run tests and more appts to get the right diagnosis and treatment sugar bear needs so will update more later,” she wrote.

“Hes [sic] havin spells where he passes out & we dont [sic] know the cause & meds aren’t helpin … we r all nervous to c what will b done with everything will update when we hear something #nervous and #hoping for the best…” she added. 

Sugar Bear has had several hospitalizations and a stint in the Intensive Care Unit all within the last 10 months. He was hospitalized at the end of May when he suffered a dizzy spell and subsequently fainted. Following the incident, Honey Boo Boo's mom posted an update on her official Facebook page. 

"Well we went to the doctor not a good report :( we will b headed to Jacksonville Florida in a few wks to get more results and c what the long term plan will b for sugarbear," the family wrote on June 24.

"Like I said I'm sorry right now don't want to share the diagnosis until we get all the information like we said b4 he is being and acting normal unless he has a episode.. so we r having fun as a family and yes we r still going on our meet and greets to mrytle beach and DC/Maryland and he will b with us..."

Last September, Sugar Bear was hospitalized for a foot infection. And in February, he was hospitalized and placed in the Intensive Care Unit for Pancreatitis.

The family became a household name with their hit TLC reality show, Here Comes Honey Boo Boo. It featured seven-year-old child beauty pageant participant Alana "Honey Boo Boo" Thompson, along with her mother June Shannon, father Mike Thompson, and three older sisters. The show is filmed in and around the family's hometown in rural McIntyre, Georgia.