I don't know if vomiting blood is common with this ailment.
1	I	I	PRON	PRP	Case=Nom|Number=Sing|Person=1|PronType=Prs	4	nsubj	4:nsubj	_
2-3	don't	_	_	_	_	_	_	_	_
2	do	do	AUX	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	4	aux	4:aux	_
3	n't	not	PART	RB	_	4	advmod	4:advmod	_
4	know	know	VERB	VB	VerbForm=Inf	0	root	0:root	_
5	if	if	SCONJ	IN	_	9	mark	9:mark	_
6	vomiting	vomit	VERB	VBG	VerbForm=Ger	9	csubj	9:csubj	_
7	blood	blood	NOUN	NN	Number=Sing	6	obj	6:obj	_
8	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	cop	9:cop	_
9	common	common	ADJ	JJ	Degree=Pos	4	advcl	4:advcl:if	_
10	with	with	ADP	IN	_	12	case	12:case	_
11	this	this	DET	DT	Number=Sing|PronType=Dem	12	det	12:det	_
12	ailment	ailment	NOUN	NN	Number=Sing	9	obl	9:obl:with	SpaceAfter=No
13	.	.	PUNCT	.	_	4	punct	4:punct	_
