diff --git a/dbTools/post.js b/dbTools/post.js
index 7d82ceb..e54546d 100644
--- a/dbTools/post.js
+++ b/dbTools/post.js
@@ -11,6 +11,14 @@ postDB = (DB)=>{
         });
     }
 
+    DB.removePost = (postid) => {
+        const _id = DB.ObjectID(postid);
+        return DB.postCols.deleteOne({_id}).catch((err)=>{
+            console.log(err);
+            return false;
+        });
+    }
+
     DB.newReaction = (postid, profileid, reaction) => {
         const id = DB.ObjectID(postid);
         let update = {
@@ -147,6 +155,7 @@ postDB = (DB)=>{
 
     DB.getFeed = async (profileId) => {
         const profile = await DB.getProfile(profileId);
+        if(!profile) return [];
         let ids = profile.following.map((id)=>DB.ObjectID(id));
         ids.push(DB.ObjectID(profileId))
         query = {
diff --git a/dbTools/profile.js b/dbTools/profile.js
index 87eb716..58e7e3c 100644
--- a/dbTools/profile.js
+++ b/dbTools/profile.js
@@ -12,6 +12,15 @@ userDB = (DB) => {
         });
     }
 
+    DB.removeProfile = (profileid) => {
+        const _id = DB.ObjectID(profileid);
+        if (userProfileCache[profileid]) delete userProfileCache[profileid];
+        return DB.profileCols.deleteOne({_id}).catch((err)=>{
+            console.log(err);
+            return false;
+        });
+    }
+
     DB.updateProfile = async (profileid, profileObj) => {
         let tempProfile = profileObj.toObj();
         const query = {_id: profileid};
diff --git a/index.js b/index.js
index 66fdaa0..6927a1e 100644
--- a/index.js
+++ b/index.js
@@ -48,10 +48,15 @@ DB.getDB.then((DB)=>{
     const sessionChecker = async (req, res, next) => {
         const session_id = getSessionId(req);
         const user_sid = getUserId(req);
-        const profile_id = getProfileId(req);
+        let profile_id = getProfileId(req);
         if (session_id && user_sid) {
             const userInfo = await DB.checkSessionOnDB(session_id, user_sid);
             req.userInfo = userInfo;
+            if(!await DB.getProfileCache(profile_id)){
+                const latestProfile = await DB.latestProfile(user_sid);
+                res.cookie('profile_id', latestProfile._id, cookiesOptions);
+                profile_id = latestProfile._id;
+            }
             req.profileInfo = {_id: profile_id}
             if(!userInfo) return res.redirect('/login');
             next();          
diff --git a/routes/post.js b/routes/post.js
index b43b706..05d73b6 100644
--- a/routes/post.js
+++ b/routes/post.js
@@ -9,7 +9,12 @@ DB.getDB.then((DB) => {
 
     const getProfileId = (req) => {
         return DB.ObjectID(req.cookies.profile_id || req.query.profile_id || req.body.profile_id);
-    }
+    };
+
+    const postBelongToProfile = (post, profileid) => {
+        if(!post) return false;
+        return post.profileid === profileid;
+    };
 
     router.get("/", async (req, res) => {
         const profileid = getProfileId(req);
@@ -144,6 +149,20 @@ DB.getDB.then((DB) => {
         });
     });
 
+    router.delete("/:id", async (req, res) => {
+        const profileid = getProfileId(req);
+        const postId = req.params.id;
+        const post = await DB.getPost(postId);
+        if(!postBelongToProfile(post, profileid))
+            return res.json({
+                status: "This post is not yours."
+            });
+        await DB.removePost(postId);
+        return res.json({
+            status: "ok"
+        });
+    });
+
 });
 
 module.exports = router
\ No newline at end of file
diff --git a/routes/profile.js b/routes/profile.js
index ac3f15e..9d5e486 100644
--- a/routes/profile.js
+++ b/routes/profile.js
@@ -16,6 +16,12 @@ DB.getDB.then((DB)=>{
         return DB.ObjectID(req.cookies.profile_id || req.query.profile_id || req.body.profile_id);
     }
 
+    const profileBelongsToUser = async (profileid, userid) => {
+        const profile = await DB.getProfileCache(profileid);
+        if(!profile) return false;
+        return profile.userid == (userid + '');
+    }
+
     router.get("/mine", async (req, res) => {
         let userid = req.cookies.user_sid;
         let profiles = await DB.getUserProfiles(userid);
@@ -239,6 +245,19 @@ DB.getDB.then((DB)=>{
         });
     });
 
+    router.delete("/:id", async (req, res) => {
+        const profileId = req.params.id;
+        const userid = getUserId(req);
+        if(!await profileBelongsToUser(profileId, userid)) 
+            return res.json({
+                status: "This profile is not yours."
+            });
+        await DB.removeProfile(profileId);
+        return res.json({
+            status: "ok"
+        });
+    });
+
     router.get("/:id/follow", async (req, res) => {
         let followProfileId = req.params.id;
         const profileid = getProfileId(req);