Doctors are trying to find out if the hair loss of a young girl is linked to her two doses of Covid-19 vaccine, the disease itself or another cause entirely.

Doctors were trying to find the cause of hair loss of the nine-year-old girl after she received a second vaccine shot and all family members in her house were infected with the virus.

The girl took a second shot administered by Thalang Hospital at Phuket airport on May 1. She had no problem after taking the first dose.

Her father said the girl was infected with the coronavirus following the infection in all the family members in July. Since that time, she experienced hair loss.

A picture shows the head of a girl in Phuket after she received a second Covid-19 vaccine shot and was infected with the coronavirus. (Photo: Achadtaya Chuenniran)

The situation worsened after she fully recovered from Covid-19 and felt the need to cover her head at school to avoid embarrassment.

"Everyone in the house is very stressed because of this," her father said.

The father said the daughter had not showed allergic reactions to any medicine and she was healthy before she started losing her hair.

The girl is receiving treatment at Thalang Hospital and will be referred to Vachira Phuket Hospital on Friday.