A transgender psychologist who specializes in LGBT issues has been jailed for harassing a female patient for five months.

Dr Kyle Mancuso, who is also known as Lisa, was sentenced to six months in prison for his bizarre behavior towards Felicia Martin in Houston, Texas - and prosecutors believe more of his clients could also have been victims.

Martin came forward and revealed that Mancuso sent her a barrage of strange text messages and delusional voicemail messages when she stopped her therapy sessions last year.

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Jailed: Dr Kyle Mancuso, who is also known as Lisa, was sentenced to six months in prison for his bizarre behavior towards former patient Felicia Martin in Houston, Texas

She shared her harrowing story in a bid to get other potential victims, who may be too scared to speak out, to contact the police.

His behavior escalated when he arrived at her office and gave her a book containing poems, messages and Dr Seuss cartoons he had scribbled in crayon.

Martin told ABC 13 Houston: 'Showing up at your place of work, making threatening phone calls. How horrifying that can be.

'Two weeks after I terminated the working relationship I started to receive voicemails at about 5am that were nonsensical and delusional.

She added: 'He escalated. It was frightening to me and my family.'

Last week, Mancuso was convicted, and sentenced to 180 days in jail and a $2000 fine.

Prosecutor Britney Jackson told the station: 'It speaks to the harm he did to someone who was vulnerable, and that's why we know for fact there are more people.'

Martin is now appealing to the state licensing board to get Mancuso's license to practice revoked.

Speaking out: Martin (left) revealed her harrowing story in a bid to get more of Mancuso's potential victims to come forward