Q; aah only bad dreams?..how if good dreams its good to interpret it?
A; All-Praise is due to Allah,
It was narrated from Abu Sa’eed al-Khudri that he heard the Messenger of Allaah (peace and blessings of Allaah be upon him) say: “If any one of you sees a dream that he likes, it is from Allaah, so let him praise Allaah for it and tell people about it. But if he sees something other than that, that he dislikes, it is from the Shaytaan, so let him seek refuge with Allaah from its evil and not mention it to anyone, for it will not harm him.”
(Narrated by al-Bukhaari, 7045).
It is not permissible to speak about or mention to any person about bad dreams evidently as stated in the hadith above, also the Prophet (peace and blessings of Allaah be upon him) said: “If any one of you sees something that he dislikes, let him get up and pray, and not tell people about it.”
(Narrated by Muslim, 2263).
But as for good dreams by all means yes their is no harm in regards to telling people about it, it must be of amongst those people whom are beloved to you and that are religiously committed. As for asking about the Tafsir of it, this is also permissible so long as one forwards it to some one whom is amongst the Scholars in that field. They have to have sound knowledge to be able to give such a Fatwa on such matters (not just any person who claims to have the knowledge).
It was stated in Fath al-Baari, 12/369: According to a hadeeth narrated from Abu Razeen by al-Tirmidhi, he should not tell anybody about it except a very close friend who loves him very much, or who is very wise. According to another report, he should not talk about it except to one who is wise or one who is dear to him. According to another report, he should not tell of his dream except to a scholar or one who will give sincere advice. Al-Qaadi Abu Bakr ibn al-‘Arabi said: as for the scholar, he will interpret it in a good way for him as much as he can, and the one who will give him sincere advice will teach him something that will be of benefit to him and will help him to do that. The one who is wise is the one who knows how to interpret it and will tell him only that which will help him, otherwise he will keep quiet. The one who is dear, if he knows something good he will say it, and if he does not know or he is in doubt, he will keep quiet. End of quote.
Shaykh al-Sa’di said: Knowledge of dream interpretation is one of the branches of Islamic knowledge and a person will be rewarded for learning it and teaching it. Interpreting dreams comes under the heading of fatwas, because Yoosuf used a verb related to the word fatwa when he said to the two young men in prison, “Thus is the case judged concerning which you both did inquire (tastaftiyaan)” [Yoosuf 12:41], and the king said to Yoosuf, using a word from the same root, “Explain to me (aftooni) my dream” [Yoosuf 12:43], and the young man said to Yoosuf (interpretation of the meaning): “Explain to us [aftinaa] (the dream) of seven fat cows” [Yoosuf 12:46]. So it is not permissible to interpret dreams without knowledge. End quote. (Tafseer al-Sa’di, 1/407)
Imaam al-Baghawi said: Know that the interpretation of dreams falls into various categories. Dreams may be interpreted in the light of the Qur’aan or in the light of the Sunnah, or by means of the proverbs that are current among people, or by names and metaphors, or in terms of opposites. (Sharh al-Sunnah, 12/220)
And this is what one should do in regards to dreams according to the Sharia'.
And Allah knows best...