This WebMD article Gas: When Gas Becomes Excessive, Farting, Belching - WebMD Gas: When Gas Becomes Excessive, Farting, Belching - WebMD Gas: When Gas Becomes Excessive, Farting, Belching - WebMD Gas: When Gas Becomes Excessive, Farting, Belching - WebMD Gas: When Gas Becomes Excessive, Farting, Belching - WebMD Gas: When Gas Becomes Excessive, Farting, Belching - WebMD Gas: When Gas Becomes Excessive, Farting, Belching - WebMD