Rob Kardashian has returned to Twitter to give Kim Kardashian West the cure for morning sickness.

The 28-year-old reality TV star - who has been battling weight gain and depression for months - hadn't posted on the social media website since 29 May but came back to his account yesterday (23.06.15).

He returned to Twitter to give his 34-year-old sister - who is pregnant with her second child with husband Kanye West - some advice for the nausea she's been experiencing.

When Kim tweeted that she ''thought this nausea thing was supposed to be gone by now'', Rob replied: ''I sent u that voice note. It should help.''

The 'Keeping Up With The Kardashians' star then replied: ''Should I post it? I think people would love to hear the voice notes u send me! (sic)''.

While it's unclear what the voice note included, Rob later referenced Khloe Kardashian's ex French Montana's lyrics from 'Hard Work'.

He said: ''HARD WORK GONE PAY OFF!! I BE HIGH OFF THIS MONEY I DUNNO WHAT THEY BE ON!! (sic)''

Rob's last tweet to his older sister - who is due to give birth to a son later this year - compared her to that ''bitch from Gone Girl'', so the siblings have obviously made up.

A source close to the Kardashian family previously said: ''He has a funny sense of humor and posts weird things and then deletes them. It's just him.''