David Bock, an insect specialist at the Australian Museum, says seasonal mugginess has made things perfect for breeding insect populations.

"Mosquitoes are one of those insects that can breed really quickly and they love this moist warm wet weather," he said.

"The humid conditions are perfect for breeding and when stagnant water stays around long enough, they mate and lay their eggs on it.

"They might be in puddles, backyards and buckets and it only takes a few weeks for that whole life cycle to happen. The nymphs, or wrigglers, spend about a week in the water before being able to fly off."

While there are many different species of mosquitoes, Mr Bock says there are only a couple where the females suck blood, which helps provide the protein needed for egg development.

Following January's humidity, families from Queensland's north to Tasmania are being hassled by swarms that would normally be more at home in a tropical rainforest.

Desperate Sydney mum Sarah Mintz Schneiderv says she and he one-year-old, Laura, were so badly attacked in Dover Heights last week, the tot was covered with more than 30 bites across her face, arms and hands.

"It was horrific," she said.

"They were all over her face, arms, fingers, wrists and down both sides of her arms.

"She had a terrible reaction to them. The bites came up really red and angry, and kept swelling up for hours."

The speech pathologist has turned to a natural moisturiser to soothe Laura's bites.

"She also gets eczema, so we used the MooGoo Eczema and Psoriasis Cream on her and it instantly calmed her skin," Ms Schneiderv said.

"It immediately alleviated the redness and helped the bites dissipate."

Chief executive Melody Livingstone says sales of the cream is up 23 per cent and MooGoo's Tail Swat natural insect repellent up 14 per cent.

"The mozzies are out in force this year," she said.

"We've been inundated with people asking what can help soothe their bites."

University of South Australia researcher Stephen Fricker says humid conditions along the eastern states are perfect for "a monster month of mozzies".

UniSA has launched the fourth edition of its citizen science initiative Mozzie Monitors to track and monitor mosquitoes in urban areas in a bid to predict and mitigate disease risks.

Australian Associated Press